Review Questions
4. Which form of reproduction is thought to be best in a stable environment?
- asexual
- sexual
- budding
- parthenogenesis
5. Which form of reproduction can result from damage to the original animal?
- asexual
- fragmentation
- budding
- parthenogenesis
6. Which form of reproduction is useful to an animal with little mobility that reproduces sexually?
- fission
- budding
- parthenogenesis
- hermaphroditism
7. Genetically unique individuals are produced through ________.
- sexual reproduction
- parthenogenesis
- budding
- fragmentation
8. External fertilization occurs in which type of environment?
- aquatic
- forested
- savanna
- steppe
9. Which term applies to egg development within the female with nourishment derived from a yolk?
- oviparity
- viviparity
- ovoviviparity
- ovoviviparity
10. Which term applies to egg development outside the female with nourishment derived from a yolk?
- oviparity
- viviparity
- ovoviviparity
- ovoviviparity
11. Sperm are produced in the ________.
- scrotum
- seminal vesicles
- seminiferous tubules
- prostate gland
12. Most of the bulk of semen is made by the ________.
- scrotum
- seminal vesicles
- seminiferous tubules
- prostate gland
13. Which of the following cells in spermatogenesis is diploid?
- primary spermatocyte
- secondary spermatocyte
- spermatid
- sperm
14. Which organ has the same embryonic origin as the penis?
- clitoris
- labia majora
- greater vestibular glands
- vagina
15. Which organ has an endometrial lining that will support a developing baby?
- labia minora
- breast
- ovaries
- uterus
16. How many eggs are produced as a result of one meiotic series of cell divisions?
- one
- two
- three
- four
17. Which hormone causes Leydig cells to make testosterone?
- FSH
- LH
- inhibin
- estrogen
18. Which hormone causes FSH and LH to be released?
- testosterone
- estrogen
- GnRH
- progesterone
19. Which hormone signals ovulation?
- FSH
- LH
- inhibin
- estrogen
20. Which hormone causes the regrowth of the endometrial lining of the uterus?
- testosterone
- estrogen
- GnRH
- progesterone
21. Nutrient and waste requirements for the developing fetus are handled during the first few weeks by:
- the placenta
- diffusion through the endometrium
- the chorion
- the blastocyst
22. Progesterone is made during the third trimester by the:
- placenta
- endometrial lining
- chorion
- corpus luteum
23. Which contraceptive method is 100 percent effective at preventing pregnancy?
- condom
- oral hormonal methods
- sterilization
- abstinence
24. Which type of short term contraceptive method is generally more effective than others?
- barrier
- hormonal
- natural family planning
- withdrawal
25. Which hormone is primarily responsible for the contractions during labor?
- oxytocin
- estrogen
- β-HCG
- progesterone
26. Major organs begin to develop during which part of human gestation?
- fertilization
- first trimester
- second trimester
- third trimester
27. Which of the following is false?
- The endoderm, mesoderm, ectoderm are germ layers.
- The trophoblast is a germ layer.
- The inner cell mass is a source of embryonic stem cells.
- The blastula is often a hollow ball of cells.
28. During cleavage, the mass of cells:
- increases
- decreases
- doubles with every cell division
- does not change significantly
29. Which of the following gives rise to the skin cells?
- ectoderm
- endoderm
- mesoderm
- none of the above
30. The ribs form from the ________.
- notochord
- neural plate
- neural tube
- somites