Question

A biologist observes that a species of stick insects on a remote island has three different color traits, almost equally distributed among the population. One phenotype is dark green, a second is light green, and a third is light green with dark green stripes. Over a decade, the biologist observes that the dark green phenotype becomes the most abundant, making up nearly 70% of the population. Which statement is the best explanation for this phenomenon?
A.
None of the color characteristics are undergoing selection at the present time.
B.
A founder effect has resulted in an increase in the numbers of the dark green phenotype.
C.
The dark green phenotype benefits the insects’ survival, making them more likely to reproduce.
D.
The insects with the dark green color trait have developed an r-selection strategy for survival.

Answer 1

Answer:

C

Explanation:

Since the dark green phenotype allows the insects' to blend in with their surroundings, there will be generally more of the same dark green phenotype on the remote island. Since they are blending in with their surroundings, they survive easier, and they are able to stay alive long enough to reproduce. Let me know if this helped!