Exam 42: Animal Reproduction

-Sea stars prey on clams. Clam fishermen used to cut up sea stars and throw the parts back into the ocean in order to protect the clam beds they fished. Within months, the beds were crawling with even more sea stars, and there were almost no clams. Why, in hindsight, was cutting up the sea stars not such a good idea?

After ovulation, the mature follicle becomes the corpus luteum.

All male honeybees develop from unfertilized eggs. This is an example of

During oogenesis, oogonia differentiate and become diploid primary oocytes, which divide to produce four diploid secondary oocytes.

What role do courtship behaviors play in spawning?

Explain how a parthenogenetic organism can produce diploid offspring.

-A couple has been trying unsuccessfully to conceive for several years. An examination reveals that scar tissue blocks the woman's uterine tubes. The woman has complained about large amounts of vaginal discharge, which coincide with her husband complaining of painful urination and a pus- filled discharge from his penis. Antibiotics clear up the infections. This couple has probably been infected with

Chemical signals released into the environment are called

-The structure labeled 6 secretes

Which of the following is the best definition of parthenogenesis?

The myometrial lining of the uterus thickens in response to increased levels of estrogen and progesterone.

is the asexual process by which an organism grows a small version of itself on the body of the adult, which then pinches off when it is large enough to be independent.

In the "typical" menstrual cycle, day 1 is the day

The epididymis functions solely to store sperm.

The layer of cells that forms a barrier between the sperm and the egg is the corona radiata.

If a woman is attempting to become pregnant, the best time for her to have intercourse is day 21 of the "typical" menstrual cycle.

The production of offspring from unfertilized eggs is called parthenogenesis.

What are the three glands that contribute fluid to semen?

Spawning depends on

Vasectomy and tubal ligation result in