Which of the following is NOT true about mass extinctions?

a. It happens when a species goes extinct.

b. It can be caused by gradual environmental change.

C. It can be seen in the fossil record.

d. It can be caused by a catastrophic change.

Explain light independent reactions

Give an example of a trait that is controlled by more than one gene.

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.