Answer:
C. leaching them from one area and precipitating them elsewhere
Explanation:
The secondary enrichment zone is formed by the deposition of metals which are leached from above zone by the action of ground water deposition the leached metals somewhere else. Similarly, the copper deposits are also formed.
Thus the option C is the most appropriate answer to the given question.
How many hours of activity should portion sizes for meals be enough to sustain for?a. 1
b. 2
c. 3
d. 4
Answer:
D) 4
Explanation:
A balanced meal should provide enough energy to sustain about 3 to 4 hours of moderate activity. This depends on factors like individual's size, age, gender, and level of physical activity.
Explanation:The number of hours that meal portion sizes should be enough to sustain activity for can vary greatly depending on factors such as the individual's size, age, gender, and level of physical activity. However, a general rule of thumb is that a balanced meal should provide enough energy to sustain about 3 to 4 hours of moderate activity. This is because the body takes about that amount of time to metabolize the foods and absorb the nutrients from a meal.
For example, if you have breakfast at 7 am, it should keep you energized until about 10 or 11 am. Then, a lunch at noon should sustain you until 3 or 4 pm, and so on. This pattern allows for 3 meals a day with a couple of healthy snacks in between if needed.
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Use this information to answer the question(s) below: A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture.In one set of experiments she succeeded in increasing acelylation of histonc fails Which of the 6 following results would she most likely see? A) decreased binding of transcription factors B) inactivation of the selected genes C) decreased chromatin condensation D) increased chromatin condensation
Answer:
D
Explanation:
Acetylation of Histone Tail is defined as the process of introduction of an Acetyl functional group to the Amino Acid of the histone tail through the action of specialized enzymes called Histone Acetyl Transferase(HAT) or Histone Deacetylase (HDAC).
Now according to the question that states that the scientist have devised a method to increase acetylation of histone tails we need to find out the effect it has on the chromatin condensation state.To understand the effect we first need to understand what effect does acetylation have on chromatin structure that is
It removes the positive charge on the histone tail thereby reducing its affinity for the negatively charged phosphate groups of DNA.
It also reduces the affinity for adjacent nucleosomes thereby leading to a considerable reduction in the ability of nucelosomes arrays to form highly ordered chromatin structures.
Finally the most important aspect of acetylation lies in creating a transcription enabling environment to allow the increased interaction of histone with regulatory proteins.In other words this leads to structural changes in the nucleosomes.
Hence it is perfectly justified to claim that that increase in acetylation of Histone Tails will eventually lead to decreased Chromatin Condenstaion.
Beta-adrenergic blocking agents decrease the oxygen demands of the heart by what mechanism?A. Increasing cardiac output, thereby increasing the oxygen supplied to the heartB. Increasing blood pressure, which increases the amount of blood returned to the heartC. Increasing conduction to the atrioventricular node, thereby increasing cardiac outputD. Decreasing the heart rate, allowing for longer filling time and increased blood to the heart
Answer:
option D
Explanation:
beta blockers usually decreases the blood pressure by inhibiting the release of adrenaline also known as epinephrine hormone which have sympathetic effects on heart. Beta blockers works by slowing down the heart rate, so less oxygen is needed by heart to pump the blood and takes longer time in filling.
but beta blockers are not recommended in hypertension. and they are also not used in asthmatic patient as it can worsen the asthma.
Regulatory and basal transcription factors regulate transcription by binding to the promoter.A) True B) False
Answer:
False
Explanation:
In eukaryotes apart from RNA polymerase, the transcription of genes requires many different proteins called transcription factors. These transcription factors are important to initiate and regulate transcription.
There are two types of transcription factors regulatory and basal transcription factors. Basal transcription factors regulate transcription by binding to a gene promoter and regulatory transcription factor regulates transcription by binding to some regulatory sequences for example enhancers and silencers.
Therefore only basal transcription factor binds to the promoter for regulating transcription. Therefore the statement is false.
1. Static stretching
2. Dynamic stretching
3. Flexibility
4. Ballistic stretching
5. Joint
a. a place in the body where bones come together
b. the ability to use your joints fully through a wide range of motion
c. a series of quick but gentle bouncing by using momentum to force your joints beyond their range of motion
d. stretching slowly as far as you can until you feel a sense of tightness, then hold the stretch for at least 10 seconds
e. involves moving parts of your body and gradually increasing reach, speed of movement, or both
Answer:
The matching goes as follows: 1-d, 2-e, 3-b, 4-c,5-a
Explanation:
Joint is the place where two bones meet with each other. A human body has different types of joints like ball and socket joint, hinge joint, pivot joint etc. They help in different movements like walking, running, throwing, eating, etc in the body.The joints are flexible in nature as they provide a whole range of motion to the body.Stretching is an important part of exercising. Before the hard workouts are done, the muscles need to stretch and relax to get ready for the workout.Static stretching involves slow stretching of the muscles and remaining in the same position for a certain duration of time.Dynamic stretching involves moving parts of the body with increasing speed and distant reach. Ballistic stretching involves a momentum to force the joints beyond their range of motion with acts like bouncing ,etc.This question asks for the definitions of different types of stretchings, flexibility, and joint. Static stretching is stretching slowly as far as possible and holding the stretch, dynamic stretching involves moving parts of the body to increase reach and speed, flexibility refers to using joints fully for wide motion range, ballistic stretching involves quick and gentle bounce using momentum, and joint is where bones meet in the body.
Explanation:The subject of this question is to identify the correct definitions of different types of stretching, flexibility, and where the term joint fits in a physical health context. Here are the correct matchings:
Static stretching is defined as: d. stretching slowly as far as you can until you feel a sense of tightness, then hold the stretch for at least 10 seconds Dynamic stretching is: e. involves moving parts of your body and gradually increasing reach, speed of movement, or both Flexibility is described as: b. the ability to use your joints fully through a wide range of motion Ballistic stretching refers to: c. a series of quick but gentle bouncing by using momentum to force your joints beyond their range of motion Joint is: a. a place in the body where bones come together Learn more about Stretching and Flexibility here:
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A population of aliens with similar genetics as humans is affected by a homozygous recessive condition known as "xbziq." This condition causes aliens to die at young ages because their digestive tracts are not able to effectively process food and obtain the necessary nutrients and energy from their diets. Approximately 2% of the newborn aliens have the xbziq condition. What is the carrier (heterozygote) frequency in the population?
Answer:
24%
Explanation:
The given genetic trait is homozygous recessive and the frequency of homozygous recessive genotypes in the population is 2%.
Therefore, frequency of homozygous recessive genotypes (q2) = 2% = 0.02
Frequency of homozygous recessive allele (q) = square root of 0.02 = 0.141
Since p+q =1 (here, p = frequency of dominant allele).
So, p= 1-q = 1-0.141 = 0.859
The frequency of heterozygous carrier genotypes in the population = 2pq = 2 x 0.141 x 0.859 = 0.24 or 24%
Explain how the climate in a specific region differs during El Niño and La Niña.
Answer:
During El Nino and LA Nina, opposing weather conditions are observed
Explanation:
Both El Niño and La Niña are weather patterns that occurs in the Pacific Ocean. It causes changes in global temperature and rainfall levels.
El Niño is associated with warmer sea surface temperatures and increased rainfall, while La Niña is associated with cooler sea surface temperatures and drought conditions.
Explanation:During El Niño, the climate in a specific region is characterized by warmer sea surface temperatures in the central and eastern Pacific Ocean. This leads to changes in atmospheric circulation patterns which can result in increased rainfall in some areas, such as an extended wet season in South America.
On the other hand, during La Niña, the climate in a specific region is characterized by cooler sea surface temperatures in the central and eastern Pacific Ocean. This can lead to drought conditions in some regions, such as decreased precipitation in the western United States.
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In a hypothetical population of tree swallows, 18 individuals are homozygous for the c4 allele, 22 individuals are heterozygous for the allele, and 10 individuals lack the allele. What is the frequency of the c4 allele?
Final answer:
The frequency of the c4 allele in the tree swallow population is calculated by dividing the number of c4 alleles (58) by the total number of alleles (100), resulting in a frequency of 0.58 or 58%.
Explanation:
To calculate the frequency of the c4 allele in the tree swallow population, we can use the Hardy-Weinberg principle. First, let's find the total number of alleles, which is twice the number of individuals, since each individual has two alleles for a given gene. The population consists of 18 homozygous individuals (36 alleles), plus 22 heterozygous individuals (22 alleles of c4), and 10 individuals lack the allele (thus contributing 0 alleles of c4). So, there are 36 + 22 + 0 = 58 c4 alleles in total.
Next, we calculate the total number of individuals in the population, which is 18 + 22 + 10 = 50. The total number of alleles is thus 2 * 50 = 100 alleles. Now, we calculate the frequency of the c4 allele by dividing the number of c4 alleles by the total number of alleles: 58 c4 alleles / 100 total alleles = 0.58 = 58%.
Hence, the frequency of the c4 allele in the population is 0.58 or 58%.
Selective serotonin reuptake inhibitors (SSRIs) are drugs commonly prescribed for ________.
Answer:
Depression
Explanation:
Answer: depression
Explanation: they prescribe anti depressant for depression
In giraffes, long necks (N), long legs (L), dark spots (D), and the ability to digest plant material with high cellulose levels (M) are all dominant traits. What possible genotype could a long-necked, short-legged, light-spotted, cellulose-digesting giraffe have?
Answer:
NNllddMM or NnllddMm
Explanation:
Given -
a) Allele representing long neck is N and allele representing small neck is n
b) Allele representing Long legs is L and allele representing short legs is l
c) Allele representing Dark spots is D and allele representing light spots is d
d) Allele representing ability to digest plant material with high cellulose levels is M and disability to digest plant material with high cellulose levels is m
Genotype for Lock neck would be NN or Nn
Genotype for short-legged would be ll
Genotype for light-spotted would be dd
Genotype for cellulose-digesting giraffe would be MM or Mm
Hence, genotype of a giraffe with long-necked, short-legged, light-spotted, cellulose-digesting giraffe would be NNllddMM
or NnllddMm
The __________ the resistance in a blood vessel, the more rapidly the pressure __________ as blood flows through it.
Answer:
The HIGHER the resistance in a blood vessel, the more rapidly the pressure DECREASES as blood flows through it.
The human genome sequence shows that genes A and B are at opposite ends of chromosome 9. If an individual who is heterozygous for both genes (AaBb) mates with an individual that is homozygous recessive for both genes (aabb), how many of their offspring would show a recombinant phenotype?
Answer:
8 offsprings (50%)
Explanation:
When genes are on the same chromosome but very far apart, they assort independently due to crossing over (homologous recombination).
When genes are far apart, crossing over happens often enough that all types of gametes are produced with 25% frequency.
When AaBb × aabb; the offsprings are as follows:
= AaBb, Aabb, aaBb, aabb
= AaBb, Aabb, aaBb, aabb
= AaBb, Aabb, aaBb, aabb
= AaBb, Aabb, aaBb, aabb
Recombinants phenotypes of linked genes are those combinations of genes not found in the parents.
From the cross above, it is obvious that only 8 offsprings are quite different from their parents.
To calculate the recombinant frequecy, we divide (no of recombinant/ total no of offsprings) × 100%
=(8/16) × 100%
= 1/2 × 100%
=0.5 × 100%
= 50%
What single feature is primarily responsible for the variation of climate in different parts of the world?
A. Intensity of wind
B. Angle of incoming sunlight
C. Lent of daylight
D. Amount of precipitation
The angle of incoming sunlight is primarily responsible for climate variation across the world, with the tilt of Earth's axis causing different regions to experience varying levels of solar intensity, thus affecting temperature which in turn influences climate.
Explanation:The single feature that is primarily responsible for the variation of climate in different parts of the world is the angle of incoming sunlight. This is because the earth is tilted on its axis at 23.5 degrees, and as it orbits around the sun, the tilt causes variations in the angle at which sunlight hits different parts of the planet. Areas that receive more direct sunlight experience warmer climates, whereas areas with an increased angle of incoming solar radiation, particularly near the poles, result in more reflected sunlight and cooler climates. The angle of sunlight affects the intensity of solar energy received at the surface, which plays a crucial role in determining temperature, a major factor in climate variability.
In contrast to length of daylight, which does influence climate by affecting temperature, the angle at which sunlight strikes the Earth has a more profound effect on climatic conditions. For instance, even though the Arctic region experiences 24 hours of daylight in the summer, the heat is less intense because the incoming sunlight is at a very low angle. Additionally, factors such as precipitation levels, influenced by temperature, and other elements like nearness to oceans and mountain ranges, contribute to the climate but are secondary to the fundamental impact of sunlight's angle.
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Members of the kingdom protista are classified into
Answer:
Eukaryotes
Explanation:
The protista are not classified under animal, plant or fungus category. They are mostly unicellular but some protists for example, algae are considered as muticellular. The multicellular protists like seaweed provides oxygen, food and shelter for various ecosystems under water. The seaweed is similar to a plant but not categorized under plantae kingdom as it is less complex as compared with plants.
They are generally heterotropic that means they gain energy by consuming other organisms. The protists can also obtain energy by photosynthesis that is heterotropic in nature.
What is the primary source of fuel for the brain?
a.proteins
b. fats
c.carbohydrates
d.vitamins
Answer:
it's answer C
That is Carbohydrates
Explanation:
"The brain's primary source of fuel is carbohydrates,". "Those carbohydrates are broken down into sugar in a form called glucose. Your brain uses glucose as its main source of energy."
The brain's primary source of fuel is carbohydrates, specifically glucose. Although the brain can use fats and proteins under certain circumstances, carbohydrates are its preferred energy source. This underlines the importance of balanced nutrition for good brain health.
Explanation:The primary source of fuel for the brain is carbohydrates. More specifically, the brain uses glucose, a simple form of carbohydrate, as its main energy source. When you eat carbohydrates, your body breaks them down into glucose, which is then transported via the bloodstream to the brain and used as fuel. While the brain can use other nutrients like fats and proteins under certain conditions, they are not its preferred or primary source of energy. The brain's reliance on glucose is one of the reasons why balanced nutrition, including sufficient intake of carbohydrates, is vital for brain health and function.
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Manganese nodules are an example of: a.hydrogenous sediments. b. cosmogenous sediments. c.biogenous sediments. d.volcagenic sediments. e.terrigenous sediments.
Answer:
Option A, hydrogenous sediments
Explanation:
Hydrogenous sediments are made up of minerals suspended in water that precipitates out in due course of time thereby forming minerals. These sediments are found in a very small amount and generally constitute 0.5 to 1 % of the total ocean sediments. While cosmogenous sediments are made up of space materials falling on earth, biogenous sediments are made up of living organism remains, lithogenous sediments are made up of land. All manganese, ferromanganese and phosphite nodules are hydrogenous
Hence, option A is correct
Answer: A
Explanation: i used it myself from gradpoint.
Match the following. Part A1. pupa 2. tadpole 3. larva 4. complete metamorphosis 5. incomplete metamorphosis 6. juvenile 7. metamorphosis Part Ba. The change from larva to adult occurs in one dramatic step b. The change from larva to adult comes in several steps or stages c. The first or earliest period of life in a young animal d. Phase of life of an organism which undergoes metamorphosis e. The transformation of a larva to an adult f. The stage between larva and adult in insects undergoing complete metamorphosis g. A young frog or toad in the larval stage of development
The matching terms are pupa, tadpole, larva, complete metamorphosis, incomplete metamorphosis, juvenile, and metamorphosis.
Explanation:The correct matching of the terms is as follows:
1. pupa - g. A young frog or toad in the larval stage of development
2. tadpole - c. The first or earliest period of life in a young animal
3. larva - f. The stage between larva and adult in insects undergoing complete metamorphosis
4. complete metamorphosis - b. The change from larva to adult comes in several steps or stages
5. incomplete metamorphosis - a. The change from larva to adult occurs in one dramatic step
6. juvenile - The stage of life of an organism which undergoes metamorphosis
7. metamorphosis - e. The transformation of a larva to an adult
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Which part of the plasma membrane contributes the most to the fluidity of the membrane?
The fluidity of the plasma membrane is primarily due to the presence of unsaturated fatty acids in the phospholipid bilayer. These fatty acids have kinks in their tails due to double bonds that prevent them from packing together tightly, thereby increasing the membrane's fluidity. Cholesterol molecules also contribute to membrane fluidity.
Explanation:The part of the plasma membrane that contributes the most to its fluidity is the presence of unsaturated fatty acids in the phospholipid bilayer. These unsaturated fatty acids have kinks in their tails due to the presence of double bonds which prevent the fatty acids from packing together tightly, thus increasing the fluidity of the membrane. A more fluid membrane allows for greater flexibility and movement of components within the membrane, such as proteins.
Another important contributor to the fluidity of the cell membrane is cholesterol. Cholesterol molecules, embedded inside the fatty acid chains of the membrane, further hinder the tight packing of fatty acids, therefore enhancing membrane fluidity.
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The cholesterol in the plasma membrane is crucial in contributing to its fluidity. This fluidity, essential for various cellular functions, can adapt according to conditions, like temperature changes. This ensures the proper functioning and maintenance of the cell's homeostasis.
Explanation:The primary contributor to the fluidity of the plasma membrane is the presence of cholesterol molecules. The fluid mosaic model explains that the plasma membrane structure is a mosaic of components - such as phospholipids, cholesterol, proteins, and carbohydrates - which can flow and shift positions, while still maintaining the overall integrity of the membrane. Cholesterol, in particular, provides a significant contribution to this fluidity.
In the plasma membrane, cholesterol restricts the movement of phospholipids, thus managing membrane fluidity and keeping the plasma membrane from becoming too firm or too fluid. The varied fluidity across the membrane allows the membrane to segregate proteins in specific domains performing unique functions and thus plays a crucial role in maintaining the cell's homeostasis. Therefore, the plasma membrane's flexibility and adaptability, key for various cellular processes, are primarily attributed to the presence of cholesterol.
Beyond the molecular structure, it's relevant to mention that membrane fluidity is also influenced by factors such as temperature. For instance, in cold conditions, more cholesterol is contained in the plasma membranes of animals, acting as a biological 'antifreeze' and preventing the membrane from solidifying.
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Which zone in a lake would you expect to be dominated by emergent plants?
Answer:
Littoral zone
Explanation:
The littoral zone act as a connection between pelagic zone and terrestrial ecosystem. The large amount of species diversity is observed in littoral zone. The emergent plants are rooted plants that generally float over the surface but few plants are submerged in water.
The emergent plants are the marcrophytes. These plants are dominant in the littoral zone of lake. The fresh water marshes are commonly inhabited by emergent plants (Typha). The emergent plants have high primary production rate thus increasing the productivity of fresh water marshes.
Five different species of warblers, seed-eating birds, live in the same species of conifer trees. All of the birds migrate to coniferous forests during the summer, and different species reside in different areas in the same tree. They feed on the seeds of the conifer trees, but the different species do not mate with each other.
Which of the following best explains why the different warbler species can all have habitats in the same conifer trees?
a. Not all the warblers are residents in the forest at the same time of the year because of different migration patterns.
b. Physiological differences in beak structure allow the warblers to consume different species of seeds through symbiotic relationships.
c. Resource partitioning of the seeds reduces competition, and the five different species can live in the same tree.
d. Niche overlap occurs between the five different species, and living in the same tree increases competition for seeds.
Correct option is C. The different species of warblers can live in the same conifer trees by utilizing resource partitioning to reduce competition. They do this by specializing in different niches within the same habitat, foraging in different parts of the tree and utilizing different resources or behaviors such as caching seeds.
The question asks why different species of warblers can live in the same conifer trees without competing with each other. The best explanation is option c: Resource partitioning of the seeds reduces competition, allowing the five different species to coexist in the same habitat. Resource partitioning is a process where species divide the resources they use in an ecosystem, in such a way that different species utilize different times, areas, or resources, thereby reducing direct competition between them.
For example, with seed predators like birds that feed on conifer seeds, different species may have evolved unique adaptations such as beak structures that are specialized for extracting seeds in specific ways. These morphological features may allow them to access seeds from different parts of the cones, or utilize different species of conifers that coexist in the same forest. Additionally, behaviors such as caching seeds for later consumption can influence how resources are used over time and space, further reducing competition.
One species of warbler might forage at the treetops, another may stick to the middle branches, and yet another might forage closer to the ground, each thereby specializing in different areas of the same habitat. This is an example of niche differentiation, where similar species coexist in the same habitat by specializing in different ecological niches. Such specialization allows for the maintenance of biodiversity in ecosystems like coniferous forests.
Many enzymes require metal ions as cofactors due to the inherent properties of the metal ion. Metal ions, when bound to water, will favor the formation of hydroxide ion, which is a strong nucleophile. Therefore the activation of water for nucleophilic reactions such as hydrolysis is one property of metal ions that assists in catalysis. What is another?
Answer:
Another property of metal ions that assists in catalysis is stabilization of negative charge transition states.
A few properties of metal ions that assists in catalysis are is its ability to orient a substrate and perform reversible oxidation-reduction reaction as seen in redox catalysis.
Answer:
Explanation: The combination formed by an enzyme and its substrates is called the enzyme–substrate complex.
In catalysis as acid, base and salt reaction .Although metal-assisted hydrolysis of lipids remains relatively unexplored, it is undoubtedly of equal importance.
What do you expect to happen after administration of a dose of intravenous epinephrine?
Answer:
It will cause an increase in the heart rate, like a minute after administration.
Explanation:
The release of epinephrine which is also known as adrenalin, from the medulla of the adrenal gland is caused by anger or fear. And it release cause an increase in the heart rate, and blood pressure through the rushing of the blood to the brain and muscle.
The release of epinephrine can be controlled through meditation and deep breathing exercise.
what happens when the recombination frequency is greater than 50 in three point crosses
Answer:
Non parental genes will become higher than that of parental genes
Explanation:
Genes recombine when the chromosomes pieces swap physically along the chromosomes. Recombination frequency determines the percentage of offspring that recombined during the meiosis cell division.In case where recombination frequency becomes greater than fifty percent then the amount of non-parental genes would be greater than half of the total number of genes . This scenario is not feasible as in random assortment ratio of parental to non-parental genes is 1:1.of genes the Therefore, in any case the recombination frequency will not increase more than 50 percent
Select the choice that best fits each statement. The following question(s) refer to the following directions.
(A) Safe Drinking Water Act
(B) Clean Water Act
(C) Comprehensive Environmental Response Compensation and Liability Act (CERCLA)
(D) Resource Conservation and Recovery Act
(E) Toxic Substances Control Act Requires minimum safety standards for community water supplies
The Safe Drinking Water Act (A) is the best choice for the statement as it is focused on setting the minimum safety standards for community water supplies in the United States.
Explanation:The statement 'Requires minimum safety standards for community water supplies can be best paired with the Safe Drinking Water Act (A). This is because the Safe Drinking Water Act passed in 1974 in the United States, is a federal law that ensures the quality of Americans' drinking water. The law requires many actions to protect drinking water and its sources including rivers, lakes, reservoirs, springs, and groundwater wells. The other choices pertain to different aspects of environmental and water protection, with varying levels of specificity and areas of focus.
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Final answer:
The Safe Drinking Water Act (SDWA) is the legislation that sets minimum safety standards for community water supplies by establishing Maximum Contaminant Levels (MCLs) for contaminants in drinking water. Thus, option A is correct.
Explanation:
The legislation that requires minimum safety standards for community water supplies is the Safe Drinking Water Act (SDWA). This act, established by the Environmental Protection Agency (EPA) in 1974, was created to standardize drinking water quality across the United States. The SDWA authorizes the EPA to set national health-based standards for drinking water to protect against both naturally occurring and man-made contaminants that may be found in drinking water. The EPA achieves this by conducting risk assessments and setting Maximum Contaminant Levels (MCLs), which are the highest level of a contaminant that is allowed in drinking water. If the MCL is exceeded, immediate water treatment is mandated to reduce the contaminant level to an acceptable standard.
A sudden natural catastrophe resulting in massive die offs would be categorized as a density ________ limiting factor.A. AutonomousB. IndependentC. DependentD. Reliant
Answer:
Independent
Explanation:
The answer would be Independent because in massive die offs the category usually specifies as independent
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Without CV circulation, body tissues are deprived of nutrients and _____________________.
Answer: Respiratory gases(Oxygen)
Explanation:
The essential role of cadio vascular system is to supply blood; containig metabolites (glucose,amino acid, fatty acid and glycerol) and gases expecially Oxygen,needed for combustion of these nutrients(metabolites) in mitochondrial of cells (cellular Respiration) to generate ATPs for biochemical activities of the body.
A wildfire dramatically reduces a population of oak trees. Several months later, high winds blow several acorns from the surviving oak trees to a meadow several hundred miles away. The acorns germinate and establish a new population of oaks in the meadow. The surviving oaks in the original population will likely experience a ____________ effect, while the oaks in the new population will likely experience a _____________ effect.a. bottleneck; founderb. founder; heterozygote advantagec. negative frequency-dependent; frequency-dependentd. polymorphic; monomorphic
Answer:
a. bottleneck; founder
Explanation:
Bottleneck effect is a loss of a large portion of population. The loss in population results in loss of alleles and a corresponding loss in the population's genetic variability. As a result, the population often become more susceptible to diseases and other limiting factors of the environment.
Founder effects on the other hand is a phenomenon whereby a small portion of a population migrates away from the original population and ends up establishing a new population in another area. The new population most often experience low genetic variability as well as a skewed sample of the alleles in the original population. This also makes the new population to be more susceptible to environment's limiting factors.
Hence, the surviving oaks in the original population will likely experience a bottleneck effect, while the oaks in the new population will likely experience a founder effect.
Final answer:
The original oak population will likely face a bottleneck effect due to the drastic reduction in population size from the wildfire, while the new population from the blown away acorns will likely experience a founder effect, establishing different genetic characteristics.
Explanation:
The surviving oaks in the original population will likely experience a bottleneck effect, while the oaks in the new population will likely experience a founder effect. The bottleneck effect occurs after the wildfire dramatically reduces the population size, resulting in the potential loss of genetic variability and altering allele frequencies. In contrast, the founder effect happens when acorns, carried by the wind, germinate and establish a new population at a significant distance. This small group can lead to a different genetic composition in the new population, distinct from that of the original population due to random sampling of alleles.
Which is an inference? Question 6 options:
a. You measure a plant’s height every day for a week.
b. You give a plant the same amount of water every day.
c. Every day for a week, you collect data on a plant’s movement.
d. After watching a plant for a week, you determine it needs more sunlight.
Answer:
d. After watching a plant for a week, you determine it needs more sunlight.
Explanation:
An inference is a thought or idea gotten from evidence and reasoning. It helps us to gain knowledge
People on high-protein diets are advised to drink lots of water. Why? A) To reduce the strain on the kidneys due to increased urea production. B) To provide the H2O necessary for peptide bond hydrolysis. C) To replace water lost due to the diuretic effects of some amino acids. D) To dilute out toxins consumed with the high-protein foodstuffs.
Answer:
Option C
Explanation:
When proteins are taken in extra quantity, they are used, recycled and excreted regularly. Unlike fat, these are not stored in body when in excess.
Therefore, high protein diet produces lots of metabolic waste which is excreted through urine and lot of water is removed out of body regularly. Thus, in order to prevent excessive loss of water or dehydration, it is advised to drink lot of water.
Hence, option C is correct
Which transports digested lipids and bile across digestive fluids to the surface of mucosal cells?a. LDL'sb. micellesc. HDL'sd. chylomicrons
Answer:
B. Micelles
Explanation:
Digestion products of lipids such as fatty acids and monoglycerides are hydrophobic. Bile salts make these hydrophobic molecules more soluble. The amphipathic bile salts in intestinal chyme surround them to form tiny spheres called micelles. Each micelle is 2–10 nm in diameter and has almost 20–50 bile salt molecules.
During micelles formation, the hydrophobic regions of bile salts interact with fatty acids and monoglycerides while their hydrophilic regions interact with the watery intestinal chyme. These micelles move from the interior of the small intestinal lumen to the brush border of the absorptive cells where the fatty acids and monoglycerides diffuse out of the micelles into the absorptive cells. The micelles are left behind in the chyme to transport even move digested lipids.