Who developed the first scientific atomic theory?
o
a. marie curie developed the atomic theory after she discovered
radioactivity.
o
b. antoine-laurent lavoisier wrote the atomic theory while making
gunpowder.
o
c. robert boyle proposed the atomic theory in his book the skeptical
chemist.
o
d. john dalton developed the atomic theory, which he published in
1803.

The answer is "d" he developed a theory that matter is simply composed of atoms of different weights and is combined in ratios by weight.

"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."