The guppy is a small fish that people often keep in bowls or tanks in their homes.
In their bowls, guppies are harmless, but in the wild, the story is different. When some
guppy owners in Nevada grew tired of their fish, they threw them in a small lake. The
guppies then multiplied rapidly and ate all the food in the lake, so that there was none
left for the native fish, which disappeared. The same thing has happened in a number
of other lakes in the western United States, and now at least one species of fish—the
white river spring fish—is almost extinct. Thus, even a little fish like the guppy
a. can survive in lakes and rivers.
b. is sold in pet stores throughout the United States.
c. sometimes improves the ecology of lakes.
d. can cause big changes in the ecology of lakes.
The guppy is a small fish that people often keep in bowls or tanks in their homes.In their bowls, guppies are harmless, but in the wild, the story is different. When someguppy owners in Nevada grew tired of their fish, they threw them in a small lake. Theguppies then multiplied rapidly and ate all the food in the lake, so that there was noneleft for the native fish, which disappeared. The same thing has happened in a numberof other lakes in the western United States, and now at least one species of fish—thewhite river spring fish—is almost extinct. Thus, even a little fish like the guppya. can survive in lakes and rivers.b. is sold in pet stores throughout the United States.c. sometimes improves the ecology of lakes.d. can cause big changes in the ecology of lakes.
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