In male mammals, excretory and reproductive systems sharea. the vas deferens.b. the urethra.c. the seminal vesicle.d. the prostate.

Menstruation results in the discharge of __________.

Which of the following characterizes parthenogenesis?a. An individual may change its sex during its lifetime.b. Specialized groups of cells grow into new individuals.c. An organism is first a male and then a female.d. An egg develops without being fertilized.

This graph plots the rise and fall of pituitary and ovarian hormones during the human ovarian cycle. Identify each hormone (A–D) and the reproductive events with which each one is associated (P–S). For A–D, choose from estrogen, LH, FSH, and progesterone. For P–S, choose from ovulation, growth of follicle, menstruation, and development of corpus luteum. How would the right-hand side of this graph be altered if pregnancy occurred? What other hormone is responsible for triggering this change?

What term describes the mode of asexual reproduction in which offspring develop from unfertilized eggs?a. parthenogenesisb. buddingc. regenerationd. fission

Match each function with the correct structure. 2. Turns into the corpus luteum 3. Female gonad 4. Site of spermatogenesis 5. Site of fertilization in humans 6. Site of human gestation 7. Sperm duct 8. Secretes seminal fluid 9. Lining of uterus a. vas deferens b. prostate gland c. endometrium d. testis e. follicle f. uterus g. ovary h. oviduct

In sperm competition, what is 'second-male advantage'?a. the observation that when females mate with two males, each male fertilizes the same number of eggsb. the observation that when females mate with two males, the second male fertilizes most of the eggsc. the observation that females routinely mate with at least two males before laying eggs or becoming pregnantd. the observation that accessory fluids prevent matings by second males—for example, by forming copulatory plugs

Add labels to the figure that follows, which illustrates female internal reproductive organs.

What happens to the egg cell and the remains of the tissue it developed in at ovulation?