Test Answers Essay

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Chromosomes are composed of the genetic material called _________. A. sperm B. ovum C. DNA D. nuclei Correct Points Earned: 1/1 Correct Answer: C Your Response: C 2. Intense sexual arousal may: A. cause ovulation. B. make it more difficult to conceive a child. C. have no effect on ovulation. D. lead to an increase in sperm production. Incorrect Points Earned: 0/1 Correct Answer: A Your Response: C 3. Who determines the baby's sex? A. neither parent in particular B. the father C. both parents D. the mother Correct Points Earned: 1/1 Correct Answer: B Your Response: B 4. The cephalocaudal principle of development refers to the fact that prenatal development proceeds from: A. the trunk of the body towards the extremities. B. large structures to smaller structures. C. head to tail (top to bottom). D. the extremities towards the trunk of the body. Incorrect Points Earned: 0/1 Correct Answer: C Your Response: D 5. Although only about the length of a thumb, an embryo at week 8 has developed: A. toenails and fingernails. B. eyelashes. C. the wrinkled structure of an adult brain. D. all of its basic body structures (except for the brain). Correct Points Earned: 1/1 Correct Answer: D Your Response: D 6. The earliest date at which at survival is possible, called the _____________ is approximately _______ old. A. neural tube; 38 B. germinal stage; 29 C. age of viability; 22-23 weeks D. embyronic period; 25 weeks Incorrect Points Earned: 0/1 Correct Answer: C Your Response: D 7. Pick out the FALSE statement about morning sickness. A. It tends to occur during the first trimester. B. It involves queasiness that can occur on and off all day. C. It may be a built in evolutionary mechanism keeping pregnant women from

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