Reproduction & development essays

1. In vertebrates, changes in the mechanisms of fertilization and embryonic

development have been of adaptive value. Compare these mechanisms and

indicate their contribution to the evolutionary success of the following animals:

A. fish

B. amphibian

C. bird

D. mammal

2. Describe the role of the hypothalamus, the pituitary hormones, and the ovarian

hormones in the regulation of the human menstrual cycle. Include in your

discussion the concept of feedback control and the way in which fertilization of

the egg alters the menstrual cycle.

3. What is gastrulation. What are the three primary germ layers? What adult tissues are derived from each?

4. Compare and contrast the origin and maturation of the male and female

gametes in a flowering plant and in a mammal.

5.         Discuss the most effective method of birth control for each of the following couples: Defend your answer.
            Couple A which has intercourse three times per week, but never wants to have children
            Couple B which has intercourse one a month, but plan to have children eventually.
            Couple C which has intercourse three times per week and plan to have children someday.