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Question: guppies are small fish found in streams in venezuela male...

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Guppies are small fish found in streams in Venezuela. Male guppies are brightly colored, with black, red, blue and iridescent (reflective) spots. Males cannot be too brightly colored or they will be seen and consumed by predators, but if they are too plain, females will choose other males. Natural selection and sexual selection push in opposite directions. When a guppy population lives in a stream in the absence of predators, the proportion of males that are bright and flashy increases in the population. If a few aggressive predators are added to the same stream, the proportion of bright colored males decreases within about five months (3-4 generations). The effects of predators on guppy coloration have been studied in artificial ponds with mild, aggressive, and no predators, and by similar manipulations of natural stream environments (Endler, 1980. Choose the one answer that best reflects how an evolutionary biologist would answer Where did the variation in spot colors and patterns in guppy populations come from? The guppies needed particular spots to survive and reproduce, so those spots developed. The guppies wanted to change their spots, so beneficial new traits gradually appeared in their offspring generation after generation. Random genetic Changes and sexual recombination continually create new types and patterns of spots A. 0 B. C. D.Genetic changes for spots in different stream environments are caused by the stream environments themselves
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