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Blababa [14]
3 years ago
15

What does the abbreviation DNA represent

Biology
2 answers:
Marianna [84]3 years ago
8 0

Answer:

deoxyribonucleic acid

Explanation:

koban [17]3 years ago
4 0

Answer:

DeoxyriboNucleic Acid

Explanation:

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20 minutes of moderate cardiovascular exercise releases bdnf. <br> a. True <br> b. False
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The answer is true letter a
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John says, when we are not moving we do not need to respire. Do you agree? Explain your answer.
belka [17]

Answer:

no

Explanation:

because if you don't breathe you will die

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What is the name of the cell that activates CD4 and CD8 cells?
julsineya [31]

Hey there! Let's solve the problem:

CD4 T cells activate CD8 T cells through an underhanded cycle including an antigen presenting cell (APC), customarily a standard dendritic cell (DC). An APC presents a peptide to a true CD4 T cell through a Class II MHC molecule.

5 0
3 years ago
Use the model here to describe the transfer of matter and flow of energy from one trophic level to another within an ecosystem.
Andrews [41]

The food chain and food web are used to transfer energy. Plants, who are the primary energy providers in the ecosystem, use their chloroplasts to collect sunlight, which is then partially converted into chemical energy during photosynthesis.

a)

  • When herbivores eat (are the primary consumers of) plants as food, this energy is transferred to the primary consumers in the food chain.
  • This energy is stored in various organic products in plants. Then, the chemical energy contained in plant products is converted into kinetic energy, degrading the energy by turning it into heat. The secondary consumers come next.
  • Further deterioration will occur when these herbivores are consumed by secondary consumers.
  • Finally, energy will once more be destroyed when tertiary consumers eat the carnivores. As a result, the energy flow is only in one direction i.e., unidirectional.

b)

  • Additionally, the energy flow in a food chain adheres to the 10% law.
  • This law states that only 10% of energy is transferred from one trophic level to the next, with the remaining 90% being lost during the digestion process of the organism itself.

c)

  • There are typically fewer organisms at the top of an energy pyramid because It has the least quantity of energy, the top level of an energy pyramid has the fewest organisms.
  • Most ecosystems only have four trophic levels because there is eventually insufficient energy to maintain further trophic levels.

d)

  • For instance, let us assume that a plant at the producer level produces 1000 Kcal of energy.
  • When a primary producer eats this plant, it will only get 10% of the energy produced by the plant i.e., 1000/10 = 100 Kcal. the rest 90% will be used up by the plant itself for its metabolism.
  • Further when a secondary consumer eats the primary consumer, it will only get 10% of the energy produced by the plant i.e., 100/10 = 10 Kcal.
  • Lastly, as the tertiary consumer eats the secondary consumer, it will only get 10/10 = 1kcal.

learn more about ecosystem here: brainly.com/question/842527

#SPJ10

4 0
2 years ago
using your text, compare oxygen, sodium, nitrogen, and neon. which atom has the greatest capacity to gain electrons
Elden [556K]
The atom with the greatest capacity to gain electron is OXYGEN. 
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