A species of fish evolved over thousands of years to have gills that allowed the fish to swim deep in the sea. What’s the effect of this development on deep-water resources?

The fish developed the gills because of____ . Because the fish are now able to swim in deep water, their ____ in shallower water will have less food. Likewise, competition for food among deep-water fish that eat the same types of food will ____.



1.


A. genetic modification


B. hybridization


C. natural selection



2.


A . competitors

B. predators

c.prey



3

a .increase

b. decrease

C. not change