The answer is Walter Hess
Hess manipulated the diancephalon of the brain of cats by inserting metal rods in the hypothalamus regions of the brain, where the diencephalon is located, and passing electrical current through the rods to the brain region. He noticed that the cats, among other complex behavioral changes, would curl up and sleep.
Answer:
D.A substance that is produced during a chemical reaction
B. long fibres in celery
(I've done an experiment in my science class once on xylem tissue on celery)
The answer is A:4,5,3,1,2.
