Question

a scientist is trying to determine how closely related a moth species (species z) is to four other moth species (species a, b, c, and d). he examined the dna of each species and compared it to the study subject. he then created this table.

species	# of genetic differences
species b	3
species c	14
species d	28

which species is most closely related to the moth species (species z)?
○ species a
○ species b
○ species c
○ species d

Explanation:

Step1: Recall genetic relatedness concept

In evolutionary biology, fewer genetic differences between two species indicate a closer evolutionary relationship (more recent common ancestor).

Step2: Compare genetic differences

• Species A: 12 differences
• Species B: 3 differences
• Species C: 14 differences
• Species D: 28 differences

The smallest number of genetic differences is 3 (Species B).

Answer:

B. species B