Answer:
Answer is low platelets.
Explanation:
Platelets are one of the components of the blood. And it helps to prevent losing too much of blood during injury ,by forming a clot on the injury.
Ii should be noted that low platelets in the body can result to punctuate skin hemorrhages .Bleeding from the nose or vaginal can also be linked to low amount of platelets in the body.
If the mouse was in a wire cage and only the weights of the mouse, food, and water were considered, would you come to the same answer as in Part A?
Answer:
Here is the full question:
(A) If a closed container contains a mouse as well as enough food, water, and oxygen for the mouse to live for 3 weeks,
How much will the container weigh 1 and 2 weeks later after the mouse has eaten, drunk and exercised (respiration is CO2 emission), and why?
(B) If the mouse was in a wire cage and only the weights of the mouse, food, and water were considered, would you come to the same answer as in (A) and why?
Explanation:
(A) The mouse will weigh the same. This is because solids, liquid, and gases cannot escape the closed container. All of the life processes involving reactions conserve the atoms involved. Some of those atoms will appear in the form of gases, some as solids, and others as liquids but all will be retained in the closed container.
(B) In a wire cage, gases can escape. This means that the weight will not be the same after 1 and 2 weeks. The weight would be less than the original weight of the mouse, it's food, and it's water.
Genetic variation _____.a. is created by the direct action of natural selectionb. must be present in a population before natural selection can act upon the populationc. arises in response to changes in the environmentd. tends to be reduced by when diploid organisms produce gametes
Answer:
The correct answer is b. must be present in a population before natural selection can act upon the population
Explanation:
Genetic variation can be caused by mutation, recombination between chromosomes during meiosis and by fusion of two genetically different gametes during sexual reproduction.
This genetic variation is necessary for the evolution of any population. Natural selection acts on every individual and it decreases the frequency of those alleles that are not suited for the environment and increase the frequency of those alleles which helps the individual to survive in the changing environment.
Therefore genetic variation must be present in the population before natural selection act on the.
You have learned that the envirronment affects how organisms vhange over generations. How would you explain a species that remains the same for millions?
Answer:
Selection might be the reason why a given organism does not change over generations
Explanation:
This statement might be a very rare case in nature to be observed. There are some particular scenarios that can provide such cases. Imagine you are on an island that the environment conditions are not too much variable. In such conditions, the organisms that live on that island does not suffer a high amount of selective pressure from the environment. Although changes might naturally occur because of mutations on the genome, the stable conditions of the environment do not exert changes on the living organisms, and most importantly, the eventually changes that mutations provide, will be cancelled by the same stable environment conditions. So, the given species might remain the same for millions of years.
While in South America, you come across what you think are two groups of birds in the same location. They are nearly identical aside from their color. After years of observation, you conclude that the birds eat similar diets and share similar behaviors but do not reproduce with each other. These groups of birds appear to be an example of:__________A) a single biological species.B) ring species.C) two different species on the basis of reproductive behavior.D) two different species on the basis of the ecological niche occupied.E) a single ecological species.
Answer: The answer is option C) two different species on the basis of reproductive behavior
Explanation:
This situation observed in South America is a good example of Sympatric speciation.
Where, two organisms similar in many respects by
- occurring in the same territory, differing ONLY as two different species because they DO NOT interbreed - thus, becoming different species on the basis of reproductive behavior.
So, option C is the answer
A gene is considered to be non-Mendelian in its inheritance pattern if it seems to "violate" Mendel's laws. Which of the following would then NOT be considered non-Mendelian?
A gene whose expression varies depending on the gender of the transmitting parent
A gene transmitted to males from the maternal line and from fathers to daughters
A gene transmitted via the cytoplasm or cytoplasmic structures
A gene derived solely from maternal inheritance
A gene transmitted by a virus to egg-producing cells
Answer:
A gene transmitted to males from the maternal line and from fathers to daughters.
Explanation:
Gregor Mendel through his research on pea plants, came up with three laws which are:
The Law of Segregation of genes: Each inherited trait is defined by a pair of gene alleles. Genes are randomly separated to the sex cells so that sex cells contain only one allele of the pair. The Law of Dominance: An organism with alternate forms of a gene will express the form that is dominant. The Law of Independent Assortment: Genes for different traits are sorted separately from one another so that the inheritance of one trait is not dependent on the inheritance of another.In His work, he established the basic patterns of inheritance and it wasn't until after his death that sex linked inheritance patterns were identified.
He believed that a pair of genes called alleles, were transmitted, each allele from one parent and both alleles transmitted from each parent constituted the complete pair in the offspring.
However, if different variants of the same gene were inherited from both parents, the dominant gene is expressed in the offspring (phenotype).
Since the basis of his work established genes being equally transmitted by both parents to offspring, the variations being due to dominance, genes transmitted from mother to son and from father to daughter, follows the Mendelian pattern of inheritance.
A friend asks you how to determine the strongest intermolecular force present in a pure sample. Write down for them the steps you would use.
The best method used to determine the strongest intermolecular forces is to check it's it boiling or melting point.
Explanation:
So, when the molecules are polarized, the charges on the atom becomes greater which would lead to a greater intermolecular force. hence, those components will have a high boiling point. Here is the ascending of atomic bonds which would help us to determine what bonding so we could say whether it is the strongest or not.
Ionic bonds>Hydrogen bonding>Van der Waals dipole interaction>Van der Waals dispersion forces
So, you have to heat or melt the pure sample to determine the strongest intermolecular force depends on the components in the sample.
In order to properly stretch the hamstring during the active supine biceps femoris stretch, a client will need to contract which knee extension?
Answer:
The answer is the quadriceps.
Explanation:
The hamstring, located between the hip and the knee joint, is one of the biggest muscles in the human body and one of the three posterior thigh muscles. In order to properly stretch the hamstring so as not to cause any injuries, because the hamstring is one of the muscles most susceptible to injury, the person needs to stretch their quadriceps knee extension during the active supine biceps femoris stretch.
I hope this answer helps.
Explain three unique ways fungi are different from other microbes (algae, protozoans, bacteria and archaea). Compare things like cell walls, cell membranes, morphology, reproduction, life cycles.
Answer:
Whittaker explained by the five system classification in which the fungi is involved in the separated kingdom. The kingdom fungi shows different characteristics with the other group of organisms.
The cell walls of the fungi is made of chitin where as plant cell made of cellulose. The fungi can reproduce sexually as well as sexually by the formation of spores that are not found in different groups of organisms. The morphology is more or less differentiated in fungi as compared with other group of organisms.
The unique ways in which fungi are different from other microbes (algae, protozoans, bacteria and archaea) include:
1) For Cell walls:
The cell wall of fungi is composed of chitin.As opposed to the cell wall of some other microbes which is peptidoglycan.2). For cell membranes:
The cell membrane exists below the cell wall in other microbes as opposed to fungi3). For reproduction:
Fungi are able to reproduce either sexually or asexually. They are versatile in reproduction.Read more:
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In eukaryotes, translation is initiated only after transcription is completed. However, prokaryotes can initiate translation before a gene is completely transcribed. Which choice is the best explanation for this observation?
Answer:
The question lacks options, the options are:
A) Prokaryotic mRNA needs to be extensively processed before it can be translated.
B) Ribosomes, which translate the proteins, are found only outside the nucleus in prokaryotes.
C) Eukaryotic mRNA can be processed before ribosomes are moved into the nucleus to translate the protein.
D) Translation in eukaryotes cannot occur until the RNA leaves the nucleus, whereas in prokaryotes both transcription and translation occur in the cytoplasm.
The correct answer is D
Explanation:
The manner of gene expression in prokaryotes and eukaryotes is somewhat similar but the distinguishing factor is where it occurs. Gene expression occurs in two stages: Transcription, where DNA is copied into an mRNA and Translation, where the mRNA is used to synthesize amino acid sequence that forms proteins.
An eukaryotic cell possesses a membrane bound nucleus, hence, its transcription process occurs in the nucleus where the DNA is located, the matured mRNA that results from the process is then transported out of the nucleus to the ribosomes in the cytoplasm for translation to occur. However, prokaryotic cells lacks a nucleus, their DNA (genetic material) is found naked in the nucleid region of their cytoplasm, hence, both transcription and translation of their genetic material (DNA) occurs in the cytoplasm.
Since both processes occur in the cytoplasm of prokaryotes, it is possible to translate a mRNA while simultaneously transcribing the gene. As one part of the gene is transcribed into mRNA, it attaches to the ribosome and gets translated into amino acid. On the other hand, in eukaryotes, it cannot occur because the full transcript (mRNA) has to leave the nucleus first before getting translated.
A man feels anxious and frightened because he senses that someone is following him home. Once he safely reaches home and locks the door, his heart and respiratory rate slow. Which parts of the nervous system were activated during these events, and in which order?1. Sympathetic; parasympathetic2. Parasympathetic; sympathetic3. Sensory somatic; autonomic4. Autonomic; sensory somatic
Answer:
1. Sympathetic; parasympathetic
Explanation:
When the person is under stress and scared, the sympathetic division of the autonomic nervous system is activated. This activated nervous system triggers the release of stress hormones from the adrenal gland and generates flight or fight response. During this response, the heartbeat and breathing rate of the person is increased, pupils become dilated and the blood supply to skeletal muscles is increased.
Once the person is out of danger and reached home, the parasympathetic nervous system is activated. It inhibits the physiological responses generated by the sympathetic division and slows down the breathing and heart rate. The activated parasympathetic division triggers digestion and absorption of nutrients to restore the energy levels of the cells.
What type of plant life will be found along a tidal marsh?
Group of answer choices
water lilies
mainly algae and other aquatic plants
Nuphar
Soft-stemmed plants and many different types of grass.
Nuphar type of plant life will be found along a tidal marsh
Explanation:
Nuphar advena is really alike to Yellow Pond Lily, although its petals are normally kept scant bits over the water. It is being predominantly a species of tidal marshes on the Hudson River. Yellow Pond Lily can be differentiated from other features of the Nuphar species by the size of its petals and the size and appearance of its flowers.
For food and shelter, the snapping Turtles too practice Nuphar varieties. The food of Ducks in pond is comprised mostly of vegetative substances, particularly the grains of aquatic plants, including plants in the Nuphar variety.
In an experiment, investigators try to control all of the variables except one—the one that tests the hypothesis. Which of the following reasons is the primary rationale for controlling variables in an experiment?
A. To enable investigators to repeat the test.
B. To create a control group.
C. To eliminate alternative explanations for the results of an experiment.
Answer:
To eliminate alternative explanations for the results of an experiment.
Explanation:
The scientific experiments include all the procedure and observations that are observed during the experiments. The scientific experiments explain about the correct scientific information.
The particular hypothesis is tested by the scientific experiments. The experiments include controls and the variables. The variable that are used as hypothesis is not controlled and the results are matched directly. The other variables are controlled as this includes the other alternative explanation of the particular result.
Thus, the correct answer is option (C).
The majority of the U.S. population will take a pain reliever that doubles as a fever reducer at the first hint of illness. Why is this not the best practice?
A) The fever inhibits the pathogen's ability to reproduce.
B) The fever allows the immune system to respond more strongly.
C) The fever produces holes in the pathogen's membrane.
D) The fever speeds up enzymatic reactions in the pathogen.
Answer:
The correct answer is - option A.
Explanation:
Fever is the process of the body to eliminate the foreign particle such as Ag from the body body of an individual. Using pain reliever which is double of a fever reducer is not the best practice as it will impaired the first line of immunity which is fever.
Fever is the increase in the range of the temperature of the body at which it stops the replication or ability of reproducing of Ag in the body of the infected individual.
Thus, the correct answer is - option A.
A student preparing for a hike wants to pack a snack that has biomolecules that provide quickly available Energy but few excess calories.Which nutrición label list the best combination of biomolecules the provide quickly available energy while providing the fewest calories form other types of moleculee
Answer:d
Explanation:
Genetic variation _____. a. must be present in a population b. before natural selection can act upon the population c. arises in response to changes in the environment d. is created by the direct action of natural selection
Answer:
B.
Explanation:
This is the change in the amino acid sequence of DNA of an organism.
It is one of mechanisms of Natural selection. Variation makes some organism to develop selective advantages over others in the same population. Therefore they have resistance to selection pressure and more natural selected above others organisms in the same population
Genetic variation must be present in a population before natural selection can act upon the population.
Explanation:Genetic variation must be present in a population before natural selection can act upon the population. It refers to the differences in the genetic material (DNA) among individuals within a population or species. The presence of genetic variation provides the raw material for natural selection to work on, as it allows certain traits to be favored or disadvantaged based on their fitness in a given environment.
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A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The seeds of all of the offspring are yellow. Why?
Answer:
Because the yellow trait is dominant and the parent with this trait is homozygous for it.
Explanation:
Gregor Mendel performed experiments on pea plants, where he studied varying traits. In his experiments, he discovered that, for each trait, an organism (pea, in this case) receives two forms of gene called ALLELES, one from each parent. He stated in his law of segregation that these alleles randomly separate into gametes, with each gamete receiving only one allele from each parent. This alleles combine via the gamete to produce the genotype that determines the phenotype of the organism.
In a pair of allele, one allele is capable of masking the expression of another in a heterozygous state i.e. covering it up. The allele that masks or is expressed is called DOMINANT allele while the allele that is masked is called RECESSIVE allele.
Therefore, in this case, the allele for Yellow seed (Y) is dominant over the allele for green seeds (y). In a cross between two purebreds (homozygous) i.e identical alleles (YY and yy), all the F1 offsprings will possess a heterozygous genotype (Yy), which means they will all be phenotypically yellow-seeded because the allele for yellow will mask the expression of its green pair.
Explain why the change in the way that molecules of β-globin interact with each other lead to the sickling of the red blood cells in sickle cell disease.
Answer:
The sickle cell anemia occurs due to the point mutation in the beta globin chain. The valine is replaced by the glutamic acid at sixth position that results in the change in shape and size of the red blood cells.
The sickle blood cells have sickle cells as compared with the normal blood cells that are concave in shape. These cells become hydrophobic and the molecules gets stick with the blood cells. The oxygen binding capacity decreases and the sticky nature of the cells can form clot in the body.
A falsely elevated hematocrit is obtained using a defective centrifuge. Which of the following calculated values will not be affected?
Answer:
Mean cell volume (MCV)
Explanation:
MCH. The MCH is Hgb X 10/RBC count and is not affected by the Hct.
An individual who is heterozygous for two linked genes (with alleles A, a and B, b) is crossed with an a b/a b individual, and among the progeny are the following
14 AB/ab
36 Ab/ab
34 aB/ab
16 ab/ab
What is the frequency of recombination?
a) 0.60
b) 0.30
c) 0.40
d) 0.70
Answer:
b) 0.30
Explanation:
An individual who is heterozygous for two linked genes (with alleles A, a and B, b)
i.e Aa & Bb × ab/ab
This cross produce the following offspring :
14 AB/ab
36 Ab/ab
34 aB/ab
16 ab/ab
Now, the purpose of these calculation is to determine how close together on a gene (gene mapping) these recombinants are.
First, we need to determine the linked gene for the parental chromosomal configurations which are (Aa & Bb × ab/ab) and the recombinant configurations in the offspring which are ( AB/ab & ab/ab). This allows for the calculation of the recombinant frequency; and it is given by:
= [tex]\frac{number of recombinant frequency}{total number of offspring}[/tex]
=[tex]\frac{14+16}{14+36+34+16}[/tex]
= [tex]\frac{30}{100}[/tex]
= 0.3
An ovary that is placed below other flower parts in an angiosperm is called A. monoecious B. inferior C. incomplete D. gynoecium E. substandard
Answer: The answer is inferior ovary
Explanation:
Whenever the other components of a flower such as petals and seals are placed in a position ABOVE the ovary i.e ovary is buried in the receptacle of the flower; such is called an INFERIOR OVARY
Typical ratios resulting from epistatic interactions in dihybrid crosses would be ________. A) 9:3:3:1, 1:2:1 B) 1:1:1:1, 1:4:6:4:1 C) 9:3:4, 9:7 D) 1:2:2:4:1:2:1:2:1, 1:2:1 E) 3:1, 1:1
Answer:
C) 9:3:4, 9:7
Explanation:
When there are no epistatic interactions, the expected phenotypic ratio of the offspring resulting from a dihybrid cross is 9:3:3:1:
9 A_B_ : 3A_bb : 3 aaB_ : 1 aabb
If there is epistasis, the ratios change, but the new ratios will be the addition of the ratios of two or more genotypes. For example, in the recessive epistasis (9:3:4), the recessive allele of one gene (let's say aa) mask the expression of the dominant allele of the other gene (in this case, B), so two different genotypes will have the same phenotype, and therefore their ratios will combine.
In the 9:3:4 epistasis, the phenotypic ratios 9:3:3:1 change to: 9 A_B_ : 3 A_bb : 4 aaB_/aabb.
On the other hand, in the epistasis due to complementary genes (9:7) at least one dominant allele of each gene needs to be present to produce a certain phenotype. Otherwise, the phenotype will be different. For example, a plant with A_B_ genotype will have colored flowers, and a plant with the genotypes A_bb, aaB_ or aabb will have white flowers. The new ratio would be 9 colored : 7 white.
Answer: C
Explanation:
Sotonic saline and 5% dextrose in water are solutions that are considered Isotonic to human blood. What effect on red blood cells would you expect if a patient were given these fluids in an IV? A solution of 10% dextrose in water is hypertonic to blood. What would happen if you were to infuse your pationt with this solution?
Answer/Explanation:
1. Isotonic solutions are those with the same concentration of solute as another - in this case of human blood cells. The two solutions are said to have the same osmotic pressure, meaning they are in an equilibrium, and nothing will happen to the red blood cells.
2. In contrast, hypertonic solutions have more solute and less water than another solution, in this case the cytoplasm of the blood cells. I.e. the solution is more concentrated than the human blood cells. Therefore, water will flow out of the cell by osmosis to try to reach an equilibrium. This means that the red blood cell will shrink and shrivel up, as water leaves the cell in to the surrounding environment
Isotonic solutions like saline or 5% dextrose maintain the normal shape of RBCs by creating an osmotic equilibrium. Hypertonic solutions, like 10% dextrose, have a higher solute concentration than blood, causing water to leave RBCs, potentially leading to cell shrinkage and damage.
Explanation:When a patient is given an isotonic saline solution or a 5% dextrose solution, it matches the solute concentration of human blood. As such, the red blood cells (RBCs) maintain their normal shape because water flows equally in and out of the cells, creating a state known as osmotic equilibrium.
However, a 10% dextrose solution is hypertonic, meaning it has a higher solute concentration compared to human blood. When a patient is given a hypertonic solution, water will leave the red blood cells to try to equalize the solute concentration. This can cause the cells to shrink or crenate, potentially leading to cell damage. Therefore, care must be taken when administering hypertonic solutions.
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The parent of a 3-month-old infant is concerned because the infant does not yet sit by oneself. Which statement best reflects average sitting ability?
Answer:
Most babies will not sit steadily until 8 months so she is normal
Explanation:
Developmental milestones are physical, social, emotional and cognitive skills seen in infants and children as they grow. They include; Rolling, crawling, walking and also talking. Milestones differ with age range.
At three months, an infant cannot sit by oneself because their lower back is still weak. At 8 months old is when a baby can sit by oneself.
However, at three months ,infants can turn their head towards the direction of sound.
It is normal for a 3-month-old infant not to sit independently as the average age for sitting alone is 7 months. There is no immediate reason for concern unless the infant shows delays on several developmental milestones. In case of multiple delays, seeking a pediatrician's advice is recommended.
The average sitting ability for infants typically develops around 7 months old, with a range from 5 to 9 months for most babies to achieve sitting independently. This milestone requires both coordination and muscle strength. It is normal for a 3-month-old infant not to be able to sit by oneself, as developmental milestones such as holding the head up come earlier, around 6 weeks on average, with most babies achieving this by 3 weeks to 4 months old. If at 3 months old the only concern is that the baby can't sit unsupported, there is no immediate cause for concern. However, if an infant shows delays in several milestones, it is advisable to consult a pediatrician, as early intervention can be very beneficial.
A 10-year-old boy presents after noticing red streaks in his stool that began yesterday. He also complains of crampy periumbilical pain and his stools have been looser than normal since yesterday. A stool guaiac is positive. Exam is notable for non-blanching pinpoint macules on his ankles that appear slightly urticarial. What is the most likely etiology of the child's hematochezia?
ABacterial enteritis
BHemolytic uremic syndromeYour Answer
CHenoch-Schönlein purpuraCorrect Answer
DMeckel's diverticulum
Answer:
Henoch-Schönlein purpura.
Explanation:
Henoch-Schönlein purpura may be defined as the medical condition of the inflammation of the IgA antibodies in the blood vessels. This condition causes purpuric rash.
This disease mainly occurs on the lower extremities of the body and can show reddish purple patches. This might also cause vasculature and leads to the cramping in the abdominal area of the body. The stool guaiac test is positive in this condition.
Thus, the correct answer is option (C).
Florence Nightingale compared disease rates and other statistics for soldiers versus civilian populations. This is an example of __________.
Answer: Analytical epidemiology
Explanation: deals with the causes and effects of diseases, why they happened and how they occurred. In comparing the two populations, she sought to analyze the casual relationship between the two groups.
If the chromosome number of a typical cell is 16 before Mitosis, what is the chromosome number of each newly formed nucleus after nuclear division has taken place?
Answer:
16
Explanation:
Mitosis is a type of cell division that maintains the DNA content and the chromosome number of the parent cell in the daughter cells. DNA replication occurs before mitosis during the S phase and the newly formed DNA is equally distributed among the daughter nuclei. Therefore, a parent cell with 16 chromosomes in its nucleus undergoes mitosis, two daughter nuclei will be formed by the end of mitosis and each of them would have 16 chromosomes.
During mitosis, each newly formed nucleus will have the same chromosome number as the original cell.
Explanation:During the process of mitosis, the chromosome number remains the same in each newly formed nucleus as in the original cell. In this case, if the chromosome number of a typical cell is 16 before mitosis, each newly formed nucleus will also have 16 chromosomes after nuclear division has taken place. This is because mitosis is a process of cellular replication where each daughter cell receives an exact copy of the parent cell's genetic material, including its chromosomes.
This organism lives in a hot spring in Yellowstone National Park and can tolerate high amounts of heat. It is unicellular and reproduces asexually.
Answer:
This organism belongs to kingdom Archaebacteria
Explanation:
Archebacteria are prokaryotic organisms which live in harsh climate like hot springs, salt marsh, arctic climate, acidic climate, etc. They lack membrane-bound nucleus and they reproduce asexually. They are unicellular like bacteria.
Earlier archaea and bacteria are considered into the same domain but after comparing their ribosomal sequence with bacteria and eukaryotes it was found that archaea is more closely related to eukaryotes than bacteria.
Archea who are present in hot spring produce those enzymes that help them to survive in high temperatures. So the correct answer is kingdom Archaebacteria.
Answer: Archaebacteria is the right answer.
Explanation:
The cerebellum and basal nuclei are involved in regulating motor activity, starting and stopping movements, and coordinating postural movements.
A. True
B. False
Answer:
The correct answer is - True.
Explanation:
The cerebellum is the major part of the brain that receives the sensory information and regulate the motor movements. The information that is come from the various parts of the brain helps motor neurons to coordinate different functions such as speech, balancing, maintaining posture.
It is the part of the base of the brain which is responsible for the various functions such as coordination and body movements. It is made up of the four bunch of nerve cells.
Thus, the correct answer is - true.
The cerebellum coordinates body movements and balance, whereas the basal nuclei regulate motor activity, initiation and termination of movements, and postural adjustments, making the statement true.
Explanation:The statement regarding the cerebellum and basal nuclei (also known as basal ganglia) is True. The cerebellum is located just below the cerebrum and at the back of the brain, resting on top of the brainstem. It plays a crucial role in coordinating body movements, including balance, and is instrumental in motor tasks that are learned through repeated practice, such as playing a sport or typing. It achieves this by receiving and integrating sensory feedback from various parts of the body through numerous nerve pathways. On the other hand, the basal ganglia are a group of structures in the brain that help to regulate motor activity, including the initiation and termination of movements, as well as postural adjustments, alongside facilitating self-motivation.
Hyperglycemia (high blood glucose levels) would cause the pancreas to _________ insulin secretion, and hypoglycemia (low blood glucose levels) would cause the pancreas to _________ insulin secretion.
Answer: Stimulate; inhibit
Explanation:
Hyperglycemia (high blood glucose levels) would cause the pancreas to STIMULATE insulin secretion, and hypoglycemia (low blood glucose levels) would cause the pancreas to INHIBIT insulin secretion.
Insulin is a hormone secreted by the pancreas and regulate blood sugar levels by
- signalling cells of the muscles and liver to store excess blood sugar during hyperglycemia, as GLYCOGEN.
In contrast, the pancreas inhibit insulin secretion during hypoglycemia, rather stimulates GLUCAGON to favor increased release of blood sugar to meet body needs.
You find an ancient spear and apply dendrochronological methodology to discover that its growth ring pattern corresponds to 5,000 years ago. You are not satisfied with this single method and want to corroborate the date using another approach. You turn to carbon-14 methodology. If the dendrochronology data are correct, how much carbon-14 (compared to modern wood) should be present in the spear.
Answer:
About 50%
Explanation:
If the ancient spear is correctly 5,000 years and the half-life of carbon 14 is 5,730 years then it will remain about 50% of the original carbon 14 content. Half-life is the amount of time it will take for the original amount of a substance present in another substance to decrease by half