Question

which of the following best describes how molecular data can provide evidence for evolutionary relatedness? choose 1 answer: a species with more differences in their dna sequences are likely more closely related. b species with more differences in their amino acid sequences are likely less closely related. c species with fewer differences in their nucleotide sequences are likely less closely related.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Incorrect. Species with more differences in DNA sequences are likely less closely related, not more.
• Option B: Correct. Molecular evidence for evolution shows that the more differences (in amino acid or nucleotide sequences) between species, the less closely related they are, as fewer changes accumulate over shorter evolutionary times (closer relationships).
• Option C: Incorrect. Fewer differences in nucleotide sequences indicate a closer evolutionary relationship, not less.

Answer:

B. Species with more differences in their amino acid sequences are likely less closely related.