How much faster than normal extinction have humans caused extinction rates to climb?
a. 1000
b. 10
c. 1/2
d. 100

A 1000 times

Explanation:

Option (A)

Explanation: Extinction refers to the vanishing of any species or object, which are not going to reappear.

The human beings, because of their activities have raised the normal extinction rate upto 1000 times more. These activities are as follows-

All these above activities are equally responsible for causing damages to the environment and the existing ecosystem, where the different plant and animal species are harmed and are vanishing at a rapid rate.

Thus, the correct answer is option (A).

the genotypes would be 50% bb and 50% bb

the phenotypes would be 50% brown and 50% white. hope this : )