3. the cerebellum of the human is divided into two portions, while the sheep only has one portion of the cerebellum. why is there a difference?

The human brain is divided in to two parts and that is why human brain is responsible for controlling behavior of human and motor control . The sheep have only one portion. Compared to the sheep, the human olfactory bulb is larger in size while the stem on the sheep is larger than human. The cerebellum in the human brain is larger and more secure than the sheep.

This is because  animals as a whole usually rely more upon their senses and abilities of smell than humans do.

Explanation:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

the answer is c.mitochondria. glad to .