Which activity is most likely a result of a sudden, unexpected change in the environment? . a. a snake shedding its skin. b. birds migrating to the south. c. the extinction of a type of shrimp. d. bears hibernating.

Why might surface mining be less risky for miners than underground mining? a. surface miners can become trapped in a collapsed mine. b. surface miners work in dusty, enclosed areas. c. surface miners work aboveground. d. surface miners use elevators to enter mines.

Explain nonnuclear inheritance. ~ ap biology

Need will mark ! which features are created by groundwater erosion and deposition? check all that apply. a. stalagmitesb. sinkholesc. rillsd. stalactites e. gullies f. rivers