Which of the following is not a human induced cause of extinction?

introducing exotic species

over hunting

both a and b

none of the above

question 10

the chance of extinction increases with population size.

increasing

decreasing

stabilizing

none of the above

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.

In order to clone adult animals, scientists typically begin with a(n)

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.