A feedback system controls the menstrual cycle. How does a female resp when the luteinizing hormone level drops sharply?
O A. Her progesterone level drops sharply.
B. She ovulates.
C. She menstruates.
D. Her estrogen level drops sharply.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.