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The building block of proteins are amino acids. Proteins are broken down to amino acids when digesting so that new proteins can be formed.
Answer:
D. Artificial Selection.
Explanation:
Normal people can't breed cats by modifying their DNA, so options b and c are eliminated. Breeding cats for specific traits is not natural, so it is not choice a, either. Instead, selective breeding is d. artificial selection.
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Answer:
Symbiosis -interaction between two different organisms living in close physical association, typically to the advantage of both.
Explanation:
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Answer: 5 biotic are: insects, low shrubs, migratory birds, herbivores and carnivores.
5 abiotic are: wind, rain, a small amount of sunlight, permafrost and pools of water.
Explanation: