This process is called meiosis. Mitosis produces two identical daugheter cells, each with 12 chrimosomes. Meiosis produces four daughter cells with 6 chromosomes.
Answer:
Sheep Brain:
Sheep brain is smaller in size the human brain. The convolutions or folds are absent in sheep brain. Olfacory bulb is more developed in shhep's brain as compared to human brain. Sheep brain is more elongated in shape.
Human brain:
Human brain is large in size. The convolutions are more numerous in human brain. Human's brain olfactory bulb is less developed as compared with sheep's brain. Human brain is round in shape.
Narcotic drugs are analgesic that exert a depressing action on the central nervous system.
Hope this helps!