Exam (elaborations) Biology

BIOL 2450 Exam (elaborations) Biology 1. Which of the following birth control methods is a “barrier” method? b) diaphragm 2. Which of the following chemicals signals the body that the egg has been fertilized: c) human chorionic gonadotropin (hCG) 3. Which of the following occurs in fertilization: c) only the sperm nucleus enters 4. The part of the male reproductive system that adds fructose and prostaglandins to the semen is the: d) seminal vesicle 5. Which of the following birth control methods is most effective at preventing pregnancy: e) the Pill 6. The birth control method that relies on a temperature rise associated with ovulation is: c) rhythm method 7. A boy who has not passed through puberty sustains an injury to his anterior pituitary such that FSH is no longer released, but LH is normal. After he grows to maturity, one would expect that he would: b) be sterile (unable to produce viable sperm) 8. In a developing embryo, the formation of the third germ layer, the mesoderm, from the endoderm and ectoderm germ layers occurs at: d) gastrulation 9. The extra-embryonic membrane that forms the fetal part of the placenta is the: d) chorion 10. The part of the male reproductive system that adds compounds to the semen that increase sperm motility is the: c) prostate gland