Definition: this is the study of the early development of an organism, and it is quite often used to show similarities and differences between different organisms in their early stages of development.

Embryology

Explanation:

Embryology is the branch of biology that deals with the study of embryos.

An embryo is a structure representing early developmental stage of multi-cellular animals.

Hence, the study of early development of an organism is termed embryology. Comparative embryology deals with comparison of embryos of different organisms to assess similarities or differences between the organisms.

c.more precipitation,but only when emission levels.

"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."