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| 1 | |
Sexual reproduction always involves the production of gametes and fertilization. |
| | A) | True |
| | B) | False |
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| 2 | |
A single ejaculation from a nonsterile human male may contain _________________. |
| | A) | a million sperm. |
| | B) | twenty million sperm. |
| | C) | a hundred million sperm. |
| | D) | several hundred million sperm. |
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| 3 | |
A female is born with about ____ oocytes, of which about ___ will mature during her lifetime. |
| | A) | one thousand, one hundred |
| | B) | one hundred thousand, one thousand |
| | C) | two million, four hundred |
| | D) | ten million, one hundred |
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| 4 | |
Fertilization of an egg normally takes place when the sperm and egg unite in the ______________. |
| | A) | vagina. |
| | B) | uterus. |
| | C) | fallopian tube. |
| | D) | ovary. |
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| 5 | |
The follicular stage of the reproductive cycle is promoted by |
| | A) | LH. |
| | B) | FSH. |
| | C) | estrogen. |
| | D) | progesterone. |
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| 6 | |
A rise in the level of ____ causes the hypothalamus to signal the pituitary to cut off production of FSH. |
| | A) | LH |
| | B) | progesterone |
| | C) | estrogen |
| | D) | prolactin |
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| 7 | |
__________________ is the hormone that causes ovulation. |
| | A) | FSH |
| | B) | LH |
| | C) | Estrogen |
| | D) | Progesterone |
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| 8 | |
Only humans have menstrual cycles. |
| | A) | True |
| | B) | False |
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| 9 | |
The simplest and most reliable way to avoid pregnancy is _______________. |
| | A) | abstinence. |
| | B) | coitus interruptus. |
| | C) | use of a condom. |
| | D) | use of birth-control pills. |
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| 10 | |
By the end of _____, distribution of cells into the three primary tissue types has been accomplished. |
| | A) | cleavage |
| | B) | gastrulation |
| | C) | the formation of the blastocyst |
| | D) | neurulation |
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| 11 | |
Sperm develop their motility while being stored in the vas deferens. |
| | A) | True |
| | B) | False |
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| 12 | |
If an egg is fertilized, a blastocyst will attach itself to the endometrium to continue development. |
| | A) | True |
| | B) | False |
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| 13 | |
By the end of the third month, the fetus has developed all the major organs and begins moving its arms and legs. |
| | A) | True |
| | B) | False |
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| 14 | |
The development of eggs without fertilization is called _________ and occurs in many ________. |
| | A) | hermaphroditism, mammals |
| | B) | hermaphroditism, arthropods |
| | C) | parthenogenesis, mammals, |
| | D) | parthenogenesis, arthropods |
| | E) | spontaneous fertilization, amphibians |
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| 15 | |
A difference between protandry and protogyny is that in |
| | A) | protandry female gametes develop first. |
| | B) | protandry male gametes develop first. |
| | C) | protandry both male and female gonads are present. |
| | D) | protandry parthenogenesis occurs. |
| | E) | none of the above |
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| 16 | |
The SRY gene is passed on to offspring by females. |
| | A) | True |
| | B) | False |
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| 17 | |
The scrotum is located below the abdominal cavity of the male rather than located internally because __________________. |
| | A) | that is a safer location for the testes. |
| | B) | the temperature is cooler there, allowing sperm to complete their development. |
| | C) | the external location makes it easier to transport sperm to the penis during ejaculation. |
| | D) | the higher temperatures that occur there allow the sperm to develop normally. |
| | E) | both c and d |
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| 18 | |
Men with sperm counts of fewer than __________ sperm per milliliter are considered sterile. |
| | A) | 600 million |
| | B) | 250 million |
| | C) | 100 million |
| | D) | 150 million |
| | E) | 20 million |
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| 19 | |
The miniature limbs of the embryo assume their adult shapes ___________. |
| | A) | at three weeks of development. |
| | B) | during the second month of development. |
| | C) | during the third month of development. |
| | D) | during the second trimester. |
| | E) | during the third trimester. |
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| 20 | |
Which of the following is the most effective form of birth control? |
| | A) | condom |
| | B) | oral contraceptive |
| | C) | foams |
| | D) | plan B |
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