It's A because not all of the species have the same amount of adenine, the moth's is nothing like the rat's, and the amount of guanine is greater than the adenine in a moth.
Viruses are not considered alive, because they lack certain aspects that would be considered a living organism.
1. Species vary over time
2. The fossil and the living species will have some similarities and some differences
The bear population would increase. The bears would have enough food to support more cubs/bears.
Answer:
Four factors believed to cause microevolution are natural selection, mutation, gene drift and gene flow (migration). Many occurrences of these four factors result in macroevolution. 3. The allele frequency of genes in a population that has undergone microevolution slightly change.Explanation:
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