Answer:B
Explanation:
The nitrogen bases in DNA code for the sequence of amino acids that make up a protein
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The chromosomes are made up of one long strand of DNA.
Answer:
Gene flow
Explanation:
Gene flow describes the process where genetic information migrates to another population, introducing new alleles into the gene pool and increasing the variation in that population.
Having physical barriers would prevent this exchange of information. For example, two populations separated by a mountain range or body of water would have far less chances to interact and exchange genetic material. This would make it difficult for gene flow to occur.
I think it’s C because cactuses store water in them, and also it mentions that the tortoises live in dry areas so it makes sense that they’re feeding on cactuses to get some water
