I have a feeling it's when they are embryos.
The answer is : C.) Chinchillas are used as models for this research because their hearing ability is similar to that of a human. Hope I helped ;)
answer : there would be no rain.
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.
