What is the structure of a nucleotide? What are DNA's four nucleotides, and how do they pair up?
Answer:
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Select the correct arrowheads on the image.
The image shows point and non-point sources of water pollution. Which two sources are point sources of water pollution?
rural homes
city streets
agriculture
suburban
development
animal feedlot
coal-burning power plant
factory
Answer:
The two point sources of water pollution in the image are coal-burning power plant and factory.
Explanation:
Pollution refers to the release of waste and harmful substances to the environment. Substances which are harmful to the environment are known as pollutants.
Water pollution involves the contamination of water by pollutants making it unfit for human use such as such for drinking or cooking or for other uses.
The source of pollution water bodies have been divided into point and non-point sources of water pollution.
Point sources release pollutants from a single source and are transported directly through media such as a discharge pipe. The main point source of water pollution are factories and sewage treatment plants.
Nonpoint source pollution comes from various sources usually a combination of pollutants from a large area rather than from a specific sourc that can be easily identified such as discharge pipes. Most common is runoff water from city streets or agricultural settlements.
The two point sources of water pollution in the image are coal-burning power plant and factory
Answer:
The two point sources of water pollution in the image are coal-burning power plant and factory.
Explanation:
Please select the word from the list that best fits the definition
type of virus that begins to multiply immediately after it enters a cell
genetic material
active
inactive
vaccines
over-the-counter medications
ability to multiply
Answer:
availability to multiply or it could be active because it's an active virus but if it has the ability to multiply then it's just going to keep on doing it immediately faster and faster
What evidence would you observe if the
law of conservation of mass is obeyed
when mixing two solutions?
Help:(
Answer: You should have noticed that the number of atoms in the reactants is the same as the number of atoms in the product. The number of atoms is conserved during the reaction. However, you will also see that the number of molecules in the reactants and products are not the same.
If the DNA is TTA convert into mRna and then into tRNA
Explanation:
uuA please can you send me the invoice for
Which of the following is a treatment option for endometriosis?
O A.
Pain relievers
O B.
Hormone therapy
O C. Surgery
OD.
All of the above
Answer:
A
Explanation:
Not sure if it's right but yea
Answer:
The Answer is D: All of the above
Explanation:
A yellow round seed pea crossed with a green flat seed. the set up will be
YYRR
yyrr
The yellow tall are dominant
crossing hom. o zygous vs hom. ozygous
give the first set pick two of the first set and make a second set
Answer the following questions from the second set
1- Hom.zygous for yellow tall
2- Heterozygous for yellow tall
3- Hom.zygous for green flat.
Answer:
2 i think .... soooooooo confusing
Inventions Promote Change
4. How did the harnessing of electricity transform American business?
Around 1900, organizational and technological advancements in electricity sparked a new industrial revolution. The appearance of enterprises and cities was altered by electrical illumination and motors.
Businesses were able to expand their locations and increase their productivity thanks to centrally produced electricity. These accomplishments depended on the development of massive interconnected systems, most of which were monopolies controlled by corporations.
Before the war, the electricity business grew slowly, but in the 1920s it truly took off and played a significant role in the economic growth.
It offered factories a low-cost, effective source of power. It allowed for the simultaneous use of numerous sophisticated machines, paving the way for the development of mass production methods.
Because it provided the power required in consumers' homes for the new mass-produced goods, such as vacuum cleaners, refrigerators, and washing machines, electricity also contributed to the economic boom.
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The autonomic nervous system is the part of the peripheral nervous system that is responsible for
1. skeletal muscle movement.
2. involuntary bodily functions, such as sweating.
3. light, sound, taste, and smell detection.
4. new cell development.
Which of the follow statements is TRUE?
ОА. .
The hormones released from the endocrine system can cause changes in the nervous system.
OB.
The nervous system can stimulate or Inhibit the release of hormones.
It takes longer for the body to respond to the endocrine than the nervous system, but its effects usually last longer.
OC.
OD. All of the above
Answer:
D. All of the above
UIZ:
.01: Layers of the Atmosphere
Quiz 1.01: Layers of the Atmosphere
Chemicals released into the air from human activity, such as sulfur dioxide and nitrous oxide, interact with the atmosphere to make acid
rain.
in which atmospheric layer does this process happen?
O stratosphere
Othermosphere
Otroposphere
O mesosphere
1 2
3
Reading Off
4 5
Next >>
Chemicals released into the air from human activity, such as sulfur dioxide and nitrous oxide, interact with the atmosphere to make acid rain, troposphere atmospheric layer does this process happen.
Which layer of the atmosphere holds the majority of the air pollutants produced by human activity?The stratospheric ozone layer contains the majority of ozone. Over the entire world, the vertical extent or thickness of this layer varies with season and location. Air pollutants released by human activity cause ozone levels to rise close to the surface.
The major layers are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere, listed from lowest to highest. Troposphere. The troposphere of Earth rises from its surface to a height of, on average, about 12 kilometers (7.5 miles), with its height being lower at the poles and higher at the equator.
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Different species are distinguished by their (1 point)
O diet
O DNA
O size.
O physical appearance.
Different species of organisms are distinguished by their: B. DNA.
What is a species?A species can be defined as a biological classification of related organisms that have the same (similar) characteristics and they are capable of mating (breeding) with one another in a cycle or different seasons.
Based on scientific information provided through genetics, different species of organisms are distinguished by their deoxyribonucleic acid (DNA).
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1. Individuals with thicker fur had a survival advantage in the cold...
2. Random mating
3. The green skin color is being selected over blue skin color.
4. DNA.
5. They show intermediate steps in the evolution process.*
6. Different islands had very different food resources available...
7. Those who have traits that help them survive are able to reproduce...
8. It makes them unrecognizable to the immune system
9. The exposure of human populations to less UV light required...
10. The correlation between air pollution and white moth predation
11. It is a biological process that leads a population to have a widespread...
12-16 Essays
Bedbugs are small insects that live in and around the bedding of humans and feed on humans at night. Their bites cause redness,
itching, and swelling at the site of the injury. They can be small and difficult to see during the day when the linens are cleaned. In
order to remove bedbugs, an insecticidal agent is often used. In this case, pyrethroid was chemically added to a population of
bedbugs. The number of bedbugs in the infestation was significantly reduced. However, over time, the bedbug population rebounded
and further application of the pyrethroid was not successful. Evaluate which statements describe what occurred with the bedbugs and
select ALL that apply.
Answer: A, B, C
Explanation: I got the answer from USA test prep
Can someone help me with this
Answer: NO SORRY
Explanation:
Match each stage of demographic transition with its correct description. (3 points)
a. High birthrates, high infant mortality rate, no health services or family planning options
b. High birthrates, decline in deathrates, increased health services but limited family planning options
c. Low birthrates, low deathrates, higher quality of health services and family planning options
here's the CORRECT answer
Stage 1 A
Stage 2 B
Stage 3 C
The stage of demographic transition with its correct description include the following below:
Stage 1 - High birthrates, high infant mortality rate, no health services or family planning options which is denoted as option AStage 2 - High birthrates, decline in death rates, increased health services but limited family planning options which is denoted as option B.Stage 3 - Low birthrates, low death rates, higher quality of health services and family planning options which is denoted as option C.What is Demographic?This is a term which is used to describe the statistical characteristics of human populations such as age or gender and is also used especially to identify different types of markets.
In the chart we can see that the birth rate was falling in stage 3 mwhich means that there are family planning options which is adopted hence such result.
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Describe the modifications that can be done on a polypeptide chain to make it a fully functional
protein
Answer: Polypeptide chains undergo some modifications before they become fully functional. Some of these modifications include: proteolytic cleavage, lipidation and glycosylation. Proteolytic cleavage refers to the removal of some amino acids from a polypeptide chain by proteases in order for the protein to become active. An example of a substance that is modified through this process is insulin.
Explanation:
ASAP: Which of the following statements about scientific theory is false?
(1 Point)
Scientific theories are explanations of natural phenomena that do not change over time.
Scientific theories are explanations of the natural world based on strong scientific evidence.
Scientific laws that are widely accepted become scientific theories.
Answer:
im not sure im just telling because you are in hurry i think it is the first answer
Cuáles son las definiciones de la segunda ley de la termodinámica?
Ayudaaa!
Answer:
La consistencia de la energía es el tema de la Segunda Ley de la Termodinámica. Afirma que cuando la energía se transmite o se convierte, se pierde una mayor proporción de ella. La Segunda Ley también señala que toda estructura aislada tiene una propensión normal a degenerar en un estado más desordenado.
Explanation:
One way to determine the density of animals in an area is to use the mark-recapture technique. A number of individuals from a population are captured, marked so they are easily identifiable, and released back into the population. It's assumed that the captured and marked animals will randomly mingle with the rest of the population. Later, the population is re-sampled and the number of marked and unmarked animals is recorded. The following equation can then be used to estimate the size of the entire population. Gulded S Number of individuals marked in first catch Total population size, N Number of marked recaptures in second catch Total number of second catch If 25 Prairie Dogs were captured, marked, and released back into their population, and then subsequently 135 Prairie Dogs were captured, of which 18 were marked, what is the approximate total population size, N?
Answer:
The approximate total population size, N = 188 Prairie Dogs
Explanation:
The equation of the mark-recapture technique of determining population density is given below:
Number of individuals marked in the first catch/Total population size, N = Number of marked recaptures in second catch/Total number of second catch
If 25 Prairie Dogs were captured, marked, and released back into their population, and then subsequently 135 Prairie Dogs were captured, of which 18 were marked
Number of dogs marked in first catch = 25
Number of marked recaptures in the second catch = 18
Total number of second catch = 135
Substituting the given figures and solving for N, the total population:
25/N = 18/135
18N = 25 × 135
18N = 3375
N = 3375/18
N = 187.5
Thus, the approximate total population size, N = 188 Prairie Dogs
Histone modification: is fixed; once a histone is modified, it stays that way and the genes with which it is associated are turned on or off permanently. is random and independent of the environment or cell type. is fixed, but this has no effect on whether genes are expressed. can change over time in response to environmental cues, allowing genes to be turned on or off as needed. can change over time in response to environmental cues, but this has no effect on gene expression.
Answer:
The correct answer is ''can change over time in response to environmental cues, allowing genes to be turned on or off as needed.''
Explanation:
Histones are a family of proteins involved in compacting DNA into structural units called nucleosomes. Histone modifications occur in response to environmental conditions, and modulate the structure of chromatin, that is, they alter the structure of nucleosomes and therefore chromatin, and thus activate the transcription process, in which the chromatin is in the euchromatin state (loose conformation, in which the DNA information can be read), or "off" state, in which the chromatin adopts the heterochromatin conformation (compact conformation, which prevents reading), respectively. These post-translational modifications are mainly acetylation, methylation, phosphorylation, although there are many others. These make up the “histone code” that can change the expression pattern of some genes by modifying the chromatin structure, activating or silencing these genes.
What determines the shape of the active site?
The shape of the active site in a given enzyme is determined by the amino acid residues of the protein and the interaction between such amino acids and also molecules in the physiological conditions of the surrounding media.
What is the active site in a given enzyme protein?The active site in a given enzyme protein is the molecular domain in the enzyme that binds to the substrate in a chemical reaction in order to form the enzyme-substrate complex that will be converted into products. The shape of the active site in the protein enzyme also depends on the amino acids in the domain that binds to the substrate and also to the molecular interactions.
Therefore, with this data, we can see that the active site in a given enzyme protein is dependent on the amino acids in the protein and their interactions.
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What is nutrition? Write two examples of nutrients
Answer:
Nutrients are chemical compounds in food that are used by the body to function properly and maintain health. Examples include proteins, fats, carbohydrates, vitamins, and minerals.
Explanation:
hope this helps
Which of the following statements is NOT true about cellular respiration?
1. Cellular respiration breaks down sugars and other molecules to use the stored energy.
2. Cellular respiration occurs in the chloroplast in plant cells.
3. Cellular respiration occurs in the mitochondria of cells.
4. Both plants and animals perform cellular respiration.
Its in science but I have to click Biology because it didn't have the option to click science.
Answer:
Option 2 is not true (Cellular respiration occurs in the chloroplast in plant cells)
Explanation:
Photosynthesis occurs in the chloroplasts, whereas cellular respiration occurs in the mitochondria. Photosynthesis makes glucose and oxygen, which are then used as the starting products for cellular respiration. Therefore, cellular respiration takes place in the mitochondria in plants, not in chloroplasts.
Hope it helps :)
Have a great day!
2. What organs does your body use to collect the information described in the last question?
Answer:
BRAIN??????
Explanation:
WHAT WAS THE LAST QUESTION>
can ecosystem survive with only producers
Answer:
no
Explanation:
an object decelerate uniformly from 60.0m/s to a stop in 10.0s what is it acceleration?
a. 6.0m/S2
b. -6.0/S2
c.600m/S2
d.-600m/S2
Answer:
I'm not 100% sure, but I think its a. 6.0m/s2
Roger Sperry's chemoaffinity hypothesis Group of answer choices is supported by the orderly reinnervation of the frog optic tectum by regenerating retinal ganglion cells. was based upon his discovery of cell adhesion molecules in the optic tectum. relies on the random innervation of the optic tectum by retinal neurons correctly predicted that each optic tectal neuron-retinal axon pair would have a unique molecular lock-and-key recognition signal.
Answer:
is supported by the orderly reinnervation of the frog optic tectum by regenerating retinal ganglion cells
Explanation:
In vertebrates, the optic tectum represents the major part of the midbrain (mesencephalon), which is involved in the development of motor skills such as body movement, eye movement, vision, hearing, etc. In lower vertebrates such as, for example, frogs, the primary target of the optic nerve fibers (i.e., retinal ganglion cells) is the optic tectum, which is responsible for the visually guided behavior. Roger Sperry was a neurobiologist and pioneer brain researcher who won the Nobel Prize in Medicine for his investigations in neuroscience and experimental neurology. In 1940, R. Sperry made different experiments involving the visual system of frogs and he observed that when optic fibers are damaged they grow back to their original localization in the optic tectum in order to re-establish the original set of neural networks. From this observation, R. Sperry proposed his chemoaffinity hypothesis, which states that neurons have individual identification tags that specify synaptic networks.
A scientist makes a claim that a chemical in household cleaners causes cancer. Which question should other scientists ask about the claim if they are using scientific argumentation?
A. Is there too much of the chemical present in the cleaner
B. Should the cleaner be taken off the market
C. Are there safer chemicals that could be used in the cleaner?
D.are there other possible causes of cancer?
D. are there other possible causes of cancer?
Scientific argumentation involves testing hypotheses through rigorous experimentation and examination of evidence. In this case, before drawing any conclusions about the relationship between the chemical in the household cleaner and cancer, other scientists would want to examine whether there are other possible causes of cancer that should be considered. The scientist who made the claim would need to show through experiments and studies that the chemical in question is the cause of cancer and not some other variable that was not controlled in the study. And therefore, evaluating the evidence and testing the hypothesis is the fundamental part of scientific argumentation.
I NEED HELP FAST PLS
which planet is most like the sun, Jupiter or Earth? Justify your answer
Answer and Explanation:
Jupiter is more like the sun than the Earth is because Jupiter the composition is similar to the Sun's composition (what it is made of), including hydrogen and helium.
Jupiter is also a failed star, in which it has the right composition, but isn't massive enough to be a star.
#teamtrees #PAW (Plant And Water)
1. What is the primary function of the small intestines? (1 point)
A.uses mechanical digestion to break down food particles
B uses chemical digestion and absorbs nutrients the body needs
C carries food and nutrients throughout the body
D eliminates the waste the body does not need
A
Utilizes chemical digestion to assimilate nutrients for the body.
What are the small intestine's three purposes?The small intestine's main jobs are to digest food, absorb nutrients needed by the body, and eliminate unwanted substances. Additionally, it contributes to the immune system by serving as a barrier to the diverse flora that lives in the gut and preventing the entry of dangerous germs.
Does food undergo chemical breakdown in the small intestine?Most chemical digestion and nearly all absorption occur in the small intestine. Large food molecules are broken down chemically during chemical digestion into their component parts, which can subsequently be absorbed past the intestinal wall and into the bloodstream.
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Answer:
Explanation:
Answer is B uses chemical digestion and absorbs nutrients the body needs