Chapter 47: Problem 9
The human egg is fertilized in the: a. uterus. b. vagina. c. oviduct. d. cervical canal. e. ovary.
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Chapter 47: Problem 9
The human egg is fertilized in the: a. uterus. b. vagina. c. oviduct. d. cervical canal. e. ovary.
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Asexual reproduction is most successful in: a. changing environments. b. sessile animals. c. densely settled populations. d. land animals. e. genetically varied individuals.
Some placental animals provide nutrients to their embryos from an attached membranous yolk-containing sac. They are called: a. oviparous animals. b. ovoviviparous animals. c. metatherians. d. eutherians. e. mammals.
Which activity is a step in the ovarian cycle? a. FSH stimulates the pituitary to release \(\mathrm{GnRH}\). b. When FSH and LH levels fall, the corpus luteum shrinks and the uterine lining breaks down. c. Luteinizing hormone stimulates the uterus to make progesterone. d. Estrogen levels initially have a positive feedback effect on the pituitary, which is followed by higher estrogen levels causing negative feedback. e. A fully developed corpus luteum inhibits uterine lining growth.
Gametogenesis has parallel stages in egg and sperm formation. The stage in eggs that is equivalent to spermatids is the: a. primary oocyte. b. oogonium. c. ovum. d. ootid and polar bodies. e. secondary oocyte and polar body.
The slow block to polyspermy: a. is caused by a change in membrane potential from negative to positive. b. triggers the movement of \(\mathrm{Ca}^{2+}\) from the cytosol to the endoplasmic reticulum. c. triggers a decrease in egg oxidation and protein synthesis. describes the fusion of egg and sperm nuclei. e. includes the fusion of cortical granules with the egg's plasma membrane.
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