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.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.