Both the moon and the sun influence earth. the moon has a much greater influence though. why is that?
a) because the sun is less dense
b) because the sun is gaseous, not solid
c) because the sun is so far away from earth
d) because the sun is less massive than the moon

the correct answer is:

a population changes in response to a change in the environment.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."