Spermatogenesis occurs in the a. interstitial cells. Each ovarian follicle contains one a. corpus luteum. Oxytocin mainly a. controls pituitary secretion. A posterior pituitary reproductive hormone is a. estrogen. The zygote is a. a ball of cells.
Implantation is facilitated by the a. chorionic villi.
The form of asexual reproduction that produces two colonies is a. budding. By parthenogenesis, an egg cell divides specifically without the usual a. enlargement. The first group of vertebrates to completely abandon the aquatic habitat for reproduction were the a. fishes. If a detrimental mutation happens in a chromosome, a. every offspring will inherit it if the animal reproduces asexually. Moneocious a. means the same as hermaphroditism.