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Immature versions of all the major organ systems have formed by about what point in pregnancy?


A) 16 days
B) 3 weeks
C) 12 weeks
D) not until at least 30 weeks

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Fraternal twins develop when:


A) one egg is fertilized by two sperm.
B) two eggs are fertilized by one sperm.
C) multiple ovulations occur, and two eggs are fertilized.
D) one egg is fertilized by one sperm, but the resulting cells separate from one another and continue development.

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Which of these becomes the baby?


A) outer cell mass
B) trophoblast
C) inner cell mass
D) placenta

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Sperm are made in the:


A) testes.
B) epididymis.
C) ovary.
D) vas deferens.

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Ovulation refers to growth of the primary follicle.

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Normally,anywhere from one to four sperm fertilize the egg.

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From which structure does the corpus luteum develop?


A) oocyte
B) tertiary follicle
C) primary follicle
D) secondary follicle

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Propose reasons to explain why the female reproductive system evolved a menstrual cycle,but the male system does not adhere to any kind of true cycle.

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The strategies of the male and female re...

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Refer to the figure below, and then answer the question that follows. Refer to the figure below, and then answer the question that follows.    -Which item,A,B,C,D,or E,is a secondary spermatocyte? -Which item,A,B,C,D,or E,is a secondary spermatocyte?

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Implantation occurs in the ________ of the uterus.

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When a spermatogonium divides,it produces one primary spermatocyte and:


A) two secondary spermatocytes.
B) one spermatogonium.
C) one spermatid.
D) one nurse cell.

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Which of the following best describes the period during which the developing offspring is considered a fetus?


A) from fertilization to three weeks
B) from fertilization to eight weeks
C) the first trimester only
D) the third trimester only
E) from nine weeks until birth

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The sequence of development of sperm is:


A) primary spermatocyte, secondary spermatocyte, tertiary spermatocyte, spermatid, sperm.
B) primary spermatocyte, spermatogonia, sperm.
C) immature sperm, mature sperm, secondary sperm, spermatocyte.
D) spermatogonia, spermatocyte, spermatid, sperm.

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Through what structure does an oocyte travel on its way to the uterus?


A) uterine tube
B) cervix
C) vagina
D) ovary

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Enzymes are carried in the ________ of a sperm.

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An egg implants in the uterus and awaits sperm for fertilization.

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Sperm develop in the seminal vesicles.

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A fertility doctor is trying to determine why a couple is infertile.It has been determined that the woman is fertile,so the problem may be with the man.In analyzing his semen,the doctor notices adequate sperm production,but the sperm are largely inactive.He concludes that the semen may be lacking in proper nutrients for the sperm.Which structure would be the most likely candidate for the source of the problem?


A) urethra
B) seminiferous tubules
C) vas deferens
D) seminal vesicles

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Spermatids are produced by:


A) spermatogonia.
B) primary spermatocytes.
C) secondary spermatocytes.
D) sertiary spermatocytes.

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How much does the cervix ultimately dilate during labor?


A) 10 centimeters
B) 5 centimeters
C) 3 centimeters
D) 1 centimeter

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