During childbirth, a hormone produced by the pituitary gland causes muscles of the mother's uterus (or womb) to contract. The more contractions there are, the more hormone is produced. Which best explains why this occurs?

Positive feedback is used to build more contractions.
Positive feedback is used to lessen the effects of the contractions.
Negative feedback is used to build more contractions.
Negative feedback is used to lessen the effects of the contractions.

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

Does masterbation affect height growth or loss of growth hormone?

Amoeba sisters video recap pedigrees