Answer:
Social costs are private costs borne by individuals directly involved in a transaction together with the external costs borne by third parties not directly involved in the transaction.
Explanation:
Answer:
Social costs are private costs borne by individuals directly involved in a transaction together with the external costs borne by third parties not directly involved in the transaction.
Explanation:
Which of the following is a health risk associated with ozone depletion
Answer:
uv rays affect the skin, the immune system, eyes
explanation:
The ozone layer acts as a natural filter, absorbing most of the sun's burning ultraviolet (UV) rays. Stratospheric ozone depletion leads to an increase in UV-B that reach the earth's surface, where it can disrupt biological processes and damage a number of materials.
The Domain Archaea wasn't recognized as a major domain of life until the twentieth century ?
TRUE
FALSE
Answer:
true
Explanation:
What is the name of the molecule used during photosynthesis to provide the energy to make glucose?
Final answer:
Adenosine triphosphate (ATP) is the molecule that provides energy during photosynthesis for the synthesis of glucose. Alongside ATP, NADPH is also produced and used in the process. Both ATP and NADPH are generated from the light-dependent reactions of photosynthesis and are important for converting CO2 and H2O into glucose and O2.
Explanation:
The molecule used during photosynthesis to provide the energy to make glucose is adenosine triphosphate (ATP). During the light-dependent reactions of photosynthesis, solar energy is captured and used to convert ADP and inorganic phosphate into ATP, which then provides the energy necessary for the light-independent reactions, or the Calvin cycle, to produce glucose.
Moreover, the energy carrier molecule NADPH (nicotinamide adenine dinucleotide phosphate) is also generated along with ATP, which also provides the necessary reducing power for the biosynthesis of glucose from carbon dioxide.
The overall process of photosynthesis can be summarized by the chemical equation: 6CO2 + 6H2O + energy -> C6H12O6 + 6O2. This demonstrates that the energy from ATP and NADPH, generated from light energy, is crucial for the conversion of carbon dioxide and water into glucose and oxygen.
When species within a community have similar geographic range and densities, it is ________. closed open extinct all of the above
Answer:
my bio book says its a niche
Explanation:
A sub-group of individuals who suffer from a particular disease exhibit a base-pair substitution in the messenger RNA for a protein related to the disease. A researcher concludes that this form of the disease result is heritable. Which of the following, if true, would justify this conclusion?
a)There is no correlation between the incidence of the base-pair substitution and the incidence of the disease in the population.
b)The base-pair substitution does not change the amino acid that corresponds to the codon.
c)The same group of individuals exhibits a corresponding base-pair substitution in the DNA.
d)The base-pair substitution in the mRNA occurs in an intron.
Answer:
c)The same group of individuals exhibits a corresponding base-pair substitution in the DNA.
Explanation:
Heredity is a biological phenomenon extremely linked to genetics. This process is characterized by the transmission of genetic information between parents and children, through reproduction.
This genetic information is transmitted through DNA. For this reason, some genetic errors that cause diseases and mutations are passed on to the same person in a family, since they all have extremely similar DNA.
For this reason, we can say that in relation to the question above, the researcher can conclude that the disease is hereditary when the same group of individuals exhibits a corresponding base pair replacement in DNA.
An adaptation is a characteristic or behavior that helps an organism survive in its environment. Watch this video about how the sundew plant survives. Use evidence from the video to explain the plant’s adaptations.
Answer:
As the video is not available, let's have a general look at some of the adaptations of the sundew plant:
The sundew plants have a mucilage which is a sticky substance. This allows the plant to capture its prey and digest it. This gel-like sticky substance is present on the tentacles as well as the leaves of the sundew plant. This adaptation allows sundew plants to survive even in soils where there are little or no nutrients as they can get the energy from the insects they capture and digest.
The sundew plant has several adaptations that help it survive in its environment, such as sticky traps to capture insects, chemical attractants to lure prey, and enzymes for prey digestion.
Explanation:An adaptation is a characteristic or behavior that helps an organism survive in its environment. In the case of the sundew plant, it has several adaptations that allow it to thrive.
Sticky Traps: The sundew plant has leaf hairs covered in a sticky substance. These hairs act as traps that capture insects. When an insect gets stuck, the plant releases enzymes to dissolve the insect and absorb its nutrients.Chemical Attractants: The sundew plant produces attractive scents and bright colors to lure insects towards it. This adaptation helps the plant attract more prey.Prey Digestion: Once the plant captures its prey, it secretes enzymes that break down the insect's body into basic nutrients that the plant can absorb. This allows the sundew to obtain important nutrients that may be lacking in its environment.Overall, these adaptations allow the sundew plant to supplement its nutrient intake and survive in nutrient-poor environments.
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Humans need certain substances to make new cells and repair their tissues. Humans acquire these substances by eating nutritious foods. Which of the following characteristics of life do the above statements best support? A. Living organisms respond to changes in their external environments. B. Living organisms use matter and energy for their life processes. C. Living organisms regulate their internal environments. D. Living organisms must be able to reproduce to promote their species' survival.
Answer:
B. Living organisms use matter and energy for their life processes
Answer:
The answer is B. Living organisms use matter and energy for their life processes
Explanation:
Its the correct answer trust me
What does the word competition mean in biology?
Answer: Competition is when two organisms fight for the same resources
Explanation:
Which of the following activities is
powered by ATP?
A. muscle contractions
B. active transport
C. Both a and b are correct.
Muscle contraction and active transport, both activities require ATP. Hence, option C is correct.
What is ATP?ATP stands for adenosine triphosphate. It is the energy currency of our body. It is produced in mitochondria during the process of cellular respiration and it is required by our body for many biological processes like muscle contraction and active transport.
In muscle contraction, the role of ATP is to break the myosin-actin cross-bridge and to release actin from this bridge for the next contraction. It also reduces myoplasmic calcium level during muscle relaxation.
In active transport, the cell needs energy for moving molecules against a concentration gradient (from high concentration to low concentration).
Both activities require ATP. Hence, option C is correct.
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Final answer:
ATP is essential for both muscle contractions and active transport processes in cells, highlighting its role as an energy source.
Explanation:
The question Which of the following activities is powered by ATP? refers to the roles of adenosine triphosphate (ATP) in biological processes. ATP is crucial for various cellular activities, including muscle contractions and active transport. Muscle contractions occur when ATP is hydrolyzed to ADP and phosphate, which facilitates the power stroke necessary for muscle fibers to slide past each other. On the other hand, active transport, including both primary and secondary active transport, requires ATP either directly or indirectly to move substances across cell membranes against their concentration gradient.
The correct answer is C. Both a and b are correct. This indicates that both muscle contractions and active transport processes are powered by ATP, showcasing its essential role as an energy currency in cells.
using the process of bacterial transformtion, a student reseacher inserted a plasmid containing a gene for antibiotic resistance into e coil. which result will allow the student to conclude that the insertion was sucessful ?
Transfer of newly created plasmids to e coli. The bacteria that contains a plasmid with antibiotic resistance will grow in the presence of antibiotic concludes that the insertion was successful.
Explanation:The plasmid DNA that contains the foreign DNA when integrated with the competent bacteria which is e coli and heated, plasmid DNA will be entering into the bacteria by means of some smaller pores that are created in the membranes of the cell.
The plasmid DNA will be copied many times with the help of the replicating mechanism of DNA of the bacteria. Bacteria will grow on a nutrient rich food called agar after the transformation process. Those bacteria that contains a plasmid containing antibiotic resistance only grow in the antibiotic presence. Transformed bacteria will then grow in larger quantity.
pt.1 ../ there’s 2 more parts to this assignment
Answer:
C, E, B, D, A
Explanation:
Mitosis is the process by which a cell divides to form two cells. This involves the duplication of the genetic material. Therefore, mitosis begins with one diploid cell (diploid = 2 copies of the genome), and ends with two diploid cells (C).
Mitosis is a widespread process, occurring in all eukaryotic cells. This includes humans, animals, and single cell species (E)
Mitosis generates new daughter cells with the same genetic information as the parent cells, therefore it results in cellular reproduction, and regeneration of the individual organism through faithfully copying the genetic material (B)
Mitosis is a type of cell division. In mammals, a specialized type of cell division called meiosis is the process that is important for sexual reproduction. In some single celled organisms, mitosis can lead to a process of asexual reproduction in which the cell divides in two, producing a replica with an equal number of chromosomes (D)
Mitosis involves the passing on the genetic information, and increasing the number of cells (proliferation). Therefore, it is involved in development and growth of an organism, replacing old cells, and in asexual reproduction (some organisms can perform "budding" to reproduce using mitosis) (A)
Which statements best describe monsoons? Select 3 correct choices
Answer:
Deadly, Wet, and Dangerous
Explanation:
this can be memorized by repeating to yourself DWD
Answer: deadly,wet, and dangerous
Why would a red blood cell
burst when placed in a
solution of pure water?
A. The solutes rush into the cell.
B. A red blood cell would not burst if
placed in distilled water.
C. The water rushes into the cell.
Answer:
RBC burst when placed in pure water , Ans C -The water rushes into the cell. Cell swells and burst.
Explanation:
This can be understand by understanding OSMOSIS
Movement of water molecule from its higher concentration to its lower concentration through a semipermeable membrane is called OSMOSIS.
If cell is placed in any solution in which solute concentration is higher than inside the cell (HYPERTONIC SOLUTION), means water content in cell is higher then outside environment. Then the water molecule will flow from cell to the outer medium. Water molecule movement continues till concentration of solutes reaches same both in cell as well as in medium.
IF cell is placed in any solution having solute concentration lower than inside the cell. In this solution water content will be higher and solute concentration will be low (HYPOTONIC SOLUTION). Water movement will be inside the cell from the outer environment. As the result Cell swells and ultimately burst because of excess water content.
IF cell is placed in ISOTONIC SOLUTION, where concentration is same both in cell and outer environment, No movement of water molecules takes place.
What does a population graph with an S-curve show?
A. Negative growth
B. Survivorship data
C. Logistic growth
D. Life span
Answer: Logistic growth
Explanation: S-shaped curve produced when changing population numbers are plotted over time. It is usually summarized mathematically by the logistic equation.
A population graph with an S-curve shows logistic growth, reflecting three phases: rapid growth, slowdown, and stabilization at the environmental carrying capacity. It is a realistic model of population dynamics, governed by resource availability and environmental constraints.
A population graph with an S-curve shows logistic growth. This graph is a representation of how population sizes change over time in a more realistic manner compared to exponential growth. Initially, the growth rate of the population is exponential due to the abundance of resources and low population density. However, as the population increases, resources start to become limited, leading to a decrease in the growth rate. Eventually, the population size levels off as it reaches the carrying capacity of its environment, which is the maximum population size that the environment can sustain indefinitely.
In summary, this S-shaped curve comprises three distinct phases: rapid exponential growth, a slowdown in growth as resources become scarce, and stabilization at the carrying capacity. This model illustrates how environmental factors and resource availability can regulate population growth in natural systems.
What will happen if emulsification does not take place?
Answer:
To emulsify is to force two immiscible liquids to combine in a suspension—substances like oil and water, which cannot dissolve in each other to form a uniform, homogenous solution.
Explanation:
An emulsion happens when small droplets of one solution (the dispersed solution, which is often oil based) are dispersed throughout another (the continuous solution, which is often water based).Emulsions are unstable by nature, so it’s normal for them to separate or break. Emulsification plays a vital role in the breakdown of triacylglycerol (TAG) fats in human digestion. When food reaches the stomach, it mixes with acidic secretions to produce chyme. Small amounts of chyme are then propelled by the pyloric sphincter into the duodenum of the small intestine to continue the digestion process.
Duchene muscular dystrophy, or DMD, is a recessive, x-linked disease. What would you expect to see in the offspring of a woman wh
o has DMD and a man who does not have the disease?
All of their sons and none of their daughters would have the disease.
None of their children would have the disease, but they would all be carriers.
All of their daughters and none of their sons would have the disease.
Their daughters would have the disease and their sons would be carriers.
It is expected to see in the offspring of a woman who has DMD and a man who does not have the disease that all of their sons and none of their daughters will have the disease
Option A.
Explanation:Duchene muscular dystrophy, also known as DMD is a recessive, x-linked disease. It occurs when there is a mutation in the dystrophin gene. This mutation further affects the muscles of the body leading it to degenerate and ultimately death.
When a woman with DMD and a man without DMD have an offspring, their daughters and the sons will get the mutated gene signature from the mother as she is the carrier. But since the father has normal genes, the daughters will become the carriers and will not be afflicted by it. This is because the normal X chromosome from the father will be passed on to them. The sons on the other hand will have the disease as they will get one of their mother's X chromosome which would be carrying the mutated gene.
Answer:
Option A
Explanation:
Which of the following is a nonrenewable energy source?
hydroelectric power
nuclear energy
wind energy
solar energy
B. Nuclear Energy is the only logical answer
Why do plants need to be specialized to survive in arid climates?
Answer:
Area receives little precipitation.
Explanation:
Arid climate is a type of climate that receives less than 25.4 cm of rainfall throughout the year. Desert climate is called as arid climates. Rainfall in arid climates is usually irregular but when rainfall occurs then it will be huge with thunderstorm. Many plants and animals found in that climate adopt themselves from rare rainfall and they remain inactive during most of time of the year and active only on the time when rainfall occurs.Answer:
Area receives little precipitation
Explanation:
Edge nuity 2020
The percentage of people who live in households with income
below the official poverty line is referred to as
workfare
income distribution
the poverty threshold
the poverty rate
Answer:
The percentage of people who live in poverty.
(gradpoint)
Explanation:
Answer:
POVERTY RATE
Explanation:
gradpoint
In North Carolina demand for fresh water has increased dramatically. One of the main reasons for this is increased water use for agriculture.
Agriculture is an activity that requires a lot of fresh water. This is because agricultural crops need large amounts of water to grow and remain productive. In a situation of large-scale agricultural production, this need for water is even greater, causing producers to use large quantities of water that is necessary for the consumption of the population.
In addition, many producers waste water and pollute it with an excess of pesticides and deforestation.
In order to conserve fresh water and keep it at high quality levels to be used both in agriculture and for human consumption, it is necessary that agricultural producers allow the maintenance of riparian forests, use more biodegradable pesticides or with low impact on nature and pay attention to irrigation equipment to avoid waste.
which statement best describes some protein molecules in a cell?
a)proteins are long, folded chains that can form various cell parts
b)proteins are composed of four different starches that direct cell activity
c)proteins are long, twisted strands of glucose that regulate cells
d)proteins are genetically diverse substances that are synthesized in the nucleus
Answer:
A is the answer of this question
The best description for protein molecules in a cell is that they are long, folded chains of amino acids that can form various cell parts. They perform numerous roles within the cell due to their array of structures and shapes.
Explanation:The statement that best describes some protein molecules in a cell is: proteins are long, folded chains that can form various cell parts (option a). Proteins are indeed composed of chains of amino acids which fold into complex three-dimensional shapes. These varying shapes and structures enable proteins to fulfill a wide variety of roles within the cell, from being part of the cell's structural framework to acting as enzymes catalyzing biochemical reactions. In contrast, options b, c, and d are inaccurate descriptions. Proteins are not composed of starches or glucose, nor are they synthesized in the nucleus. Instead, protein synthesis primarily occurs in the ribosomes in the cytoplasm.
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What questions are addressed in an in vitro
experiment of a new drug?
Answer:
There are many questions which arise when testing a new drug. The main question that arises is whether the new drug has passed all the experimental phases and is suitable enough to be used for humans.
The first-pass metabolism has to be questioned for the drug. The side effects of the drug should be kept into consideration and should be questioned.
Questions related to the first trial of the drug have to be kept into consideration.
Final answer:
In vitro experiments of new drugs address questions related to the drug's absorption, distribution, metabolism, and elimination (ADME). They involve various assays to predict how a drug might behave in the human body and are critical for guiding subsequent drug development processes. Although useful, in vitro results need to be validated with in vivo data due to differences in complexity.
Explanation:
Key In Vitro Experiment Questions
In the context of drug discovery and development, an in vitro experiment of a new drug primarily addresses questions related to the absorption, distribution, metabolism, and elimination (ADME) of new chemical entities. These are crucial aspects in the initial phases of drug discovery. Major in vitro model systems are used to investigate these characteristics, enabling researchers to predict how the drug might behave in the human body. Regular validation of in vitro models with in vivo data is essential to ensure that the findings are predictive of how the drug will perform in clinical trials.
During the pharmacokinetic evaluation phase, these in vitro experiments provide valuable insights, such as drug permeability using assays like parallel artificial membrane permeability assays (PAMPA) or cell lines like Caco-2 and MDCK, binding to plasma proteins, liver microsomal stability, and the identification of potential harmful metabolites. It is through these findings that researchers can guide the chemical synthesis of new drugs, hypothesize about the drugs’ behavior in vivo, and design further studies to validate these predictions
Furthermore, based on in vitro data, certain clinical studies may even be waived, as the FDA recognizes in vitro assays as good predictors. However, despite their utility in ranking compounds for further study, in vitro experiments are not always perfectly reflective of in vivo outcomes due to their relative simplicity. Hence, they are often used as an initial screening tool prior to more comprehensive in vivo studies in animal models.
6. What is the KINETIC ENERGY of the 6kg cart if it is moving at a speed of 2 m/s at the
bottom of the ramp?
300 ml
500 m
400 m
A. 10)
B. 100
C. 12 J
D. 120 J
Answer:
The Kinetic energy of the 6kg cart moving at a speed of 2 m/s at the bottom of the ramp is 12 J
Explanation:
Given:
Mass of the cart = 6 kg
Speed with which the cart is moving = 2 m/s
To Find:
The Kinetic Energy = ?
Solution:
The Kinetic Energy of the object is given,
[tex]K.E= \frac{1}{2} m v ^2[/tex]
where
m is the mass of the object
v is the velocity of the object
Now substituting the given values
The Kinetic energy of the 6kg cart moving at a speed of 2 m/s is
[tex]= \frac{1}{2} m v ^2[/tex]
[tex]= \frac{1}{2} (6) (2)^2[/tex]
[tex]= \frac{1}{2} (6)(4)[/tex]
[tex]= \frac{1}{2}\times (24)[/tex]
[tex]= \frac{24}{2}[/tex]
= 12 J
If an invasive species of beetle enters this community, which change is most
likely to happen?
A. An increase in biodiversity throughout the community
B. A decline in the native species of beetle
C. A decline in competition for strangler figs as a food spruce
D. An increase in the stability of the overall ecosystem
Answer:
B. A decline in the native species of beetle
Answer:
Option B: A decline in the native species of beetle.
Explanation:
AP Environmental Science.
A cell has 12 chromosomes. How many chromosomes will each daughter cell have?
Question 8 options:
4
6
12
24
Answer:
12
Explanation:
After mitosis , two identical cells are produced with the same original number of chromosomes of the parents cells. In this case , if a cell has 12 chromosomes then each daughter cells will have 12 chromosomes after mitosis
Nitrogen is the most common element in the air. Why do bacteria play a role in the nitrogen cycle
SOS
Bacteria play a role in the nitrogen cycle because:
The bacteria’s helps in breaking down the organic materials which has nitrogen in it, and helps in giving the nitrogen back to the cycle. Bacteria helps in breaking down of the leaves and then it diffuses the nitrogen to the soil. Prokaryotes also plays an important role in the nitrogen cycle. The nitrogen fixing bacteria present in the root zone of plants basically in the soil, helps in conversion of the nitrogen into ammonia. Then the nitrifying bacteria converts the ammonia to the nitrites or can say nitrates.
Which of the following includes all the others? A. Sucrose b. Glucose c. Cellulose d. Glycogen e. Carbohydrate
Answer:c
Explanation:I just did the test
The term 'Carbohydrate' includes all the others: sucrose, glucose, cellulose, and glycogen. This is because these are all specific types of carbohydrates, with sucrose and glucose being simple carbohydrates and cellulose and glycogen being complex ones.
Explanation:The correct answer to this question is e. Carbohydrate. This is because carbohydrates act as a broad category that includes all the other choices listed. Sucrose, glucose, cellulose, and glycogen are all specific types of carbohydrates. Carbohydrates are a type of biomolecule, primarily serving as energy storage. Sucrose and glucose are both simple carbohydrates, also known as sugars. Cellulose and glycogen are complex carbohydrates. The latter is primarily stored in animal tissues, especially the liver and muscle. Cellulose is a main substance in the walls of plant cells, helping plants to remain stiff and strong.
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What has 5 carbon sugar, phosphate group, and nitrogoneus base
Answer:
Nucleic acids are polymers of individual nucleotide monomers. Each nucleotide is composed of three parts: a 5-carbon sugar, a phosphate group, and a nitrogenous base. Only two 5-carbon sugars are found in nature: ribose and deoxyribose.
Explanation:
Final answer:
A structure with a five-carbon sugar, phosphate group, and nitrogenous base is called a nucleotide. It is the basic building block of nucleic acids like DNA and RNA, where it forms the sugar-phosphate backbone and contains bases for pairing.
Explanation:
The structure that has a five-carbon sugar, a phosphate group, and a nitrogenous base is known as a nucleotide, which is the monomer of nucleic acids like DNA and RNA. Each nucleotide in DNA is made up of deoxyribose, which is the five-carbon sugar, while in RNA, the sugar is ribose. The sugar is connected to a phosphate group at its 5' carbon and to a nitrogenous base at the 1' carbon.
There are four different nitrogenous bases in DNA: adenine, guanine, cytosine, and thymine. In RNA, uracil is used instead of thymine. The phosphate group of one nucleotide can link to the 3' carbon of the sugar in another nucleotide, forming the sugar-phosphate backbone of the nucleic acid strand. The nitrogenous bases pair through hydrogen bonding, which creates the structure of the double helix in DNA.
In which order did the events forming our solar system occur?
The solar nebula became hot and dense pulling in more gas.This flattened into a rotating disk. It spun faster and faster, forming the Sun.
Gas was pulled toward the center, forming the Sun. Gas flattened into a rotating disk and became hot and dense, forming a solar nebula that spun faster and faster.
Gas flattened into a rotating disk and became hot and dense, forming a solar nebula that spun faster and faster. Gas was pulled toward the center, forming the Sun.
The solar nebula spun faster and faster and flattened into a rotating disk. Most of the gas was pulled toward the center, where it became hot and dense, forming the Sun.
Answer:
The order in that the events forming our solar system occurred was: The Solar Nebula spun faster and faster and flattened into a rotating disk. Most of the gas was pulled toward the center, where it became hot and dense, forming the Sun.
Explanation:
Answer:
The solar nebula spun faster and faster and flattened into a rotating disk. Most of the gas was pulled toward the center, where it became hot and dense, forming the Sun.
Explanation:
The most recent studies still do not explain exactly how our solar system was formed, but one of the most accepted theories says that before the sun and planets existed, what existed in place of the solar system was a gigantic cloud of gases and dust (nebula) ), much larger than the current solar system.
The gases in that cloud would be the ones we know today: oxygen, nitrogen and mainly hydrogen and helium. The dust would be formed by all the other chemical elements: iron, aluminum, uranium, etc. For some reason not yet explained, this cloud found favorable conditions to gather and join in small blocks, which in turn began to come together in larger and larger blocks.
The block that first formed in the center of the cloud is believed to have become so large and heavy that its gravitational force has become strong enough to trap gases very easily. Continuing to attract gases due to the gravitational force, this block increased so much in size and mass that it ended up becoming what we now call the Sun. The smaller blocks that formed around the central block then gave rise to the planets.
all of the following processes require the cell to use ATP energy except
Answer:
Passive Transport
Explanation:
The passive transport is an energy-independent process, which does not use ATP energy. It involves transport of non-polar, uncharged molecules and some small polar molecules through lipid bilayer.
Answer:
passive transport
Explanation:
All of the following processes require the cell to use ATP energy, except passive transport. I hope that this is the answer that you were looking for and it has actually come to your help.