Question

Male guppies found in populations exposed to few predators are typically

A. highly camouflaged.
B. the same color as guppies found with many predators.
C. seen mating with brightly colored females.
D. brightly colored.
E. None of the choices are correct.

Answer 1

Male guppies in populations with few predators are brightly colored due to sexual selection, as females prefer these males, while in the presence of predators, they become more drab for camouflage.

Step-by-step explanation:

The question pertains to the coloration of male guppies in relation to the presence of predators. In John Endler's study, it was observed that in the absence of predators, male guppies evolved to become brightly colored. This is attributed to sexual selection, where female guppies prefer more brightly-colored males. Conversely, when predators are present, male guppies become more drab to better camouflage themselves and avoid being eaten.

The correct option reflecting these findings is: Male guppies found in populations exposed to few predators are typically brightly colored. This relates to the broader biological concept of natural selection and how predation pressure can influence the phenotypic traits within a population.