Question 1

In which stage do the three germ layers form?

Accepted Answer

A)   gastrula
B)   blastocyst
C)   neurula
D)   morula
E)   8-cell stageF) A) and E)
G) All of the above

Question 2

Which of the following mammalian structures is derived from one of the extraembryonic membranes?

Accepted Answer

A)   placenta
B)   uterus
C)   ovary
D)   cervix
E)   labiaF) A) and B)
G) All of the above

Question 3

The failure of a couple to achieve pregnancy after a year of regular, unprotected intercourse is termed

Accepted Answer

A)   parthenogenesis.
B)   menopause.
C)   contraception.
D)   infertility.
E)   abortion.F) B) and C)
G) A) and C) D

Question 4

Which statement is correct about the placenta?

Accepted Answer

A)   The placenta allows for free exchange of blood from the fetus to the mother but not the other direction.
B)   The placenta allows for free exchange of blood from the mother to the fetus but not the other direction.
C)   The placenta allows for a limited exchange of gases from the fetus to the mother but a free exchange from the mother to the fetus.
D)   The placenta does not allow the exchange of blood between the fetus and mother but allows the exchange of gases.
E)   The placenta does not allow the exchange of blood or gases between the fetus and mother.F) A) and B)
G) D) and E)

Question 5

An unfertilized egg from a female Komodo dragon may develop directly into a young Komodo dragon. This is an example of

Accepted Answer

A)   parturition.
B)   assisted reproduction.
C)   parthenogenesis.
D)   abiogenesis.
E)   copulation.F) C) and D)
G) C) and E) C

Question 6

Which of the following is 100% effective against both pregnancy and STDs?

Accepted Answer

A)   vasectomy
B)   female condom
C)   diaphragm
D)   tubal ligation
E)   abstinenceF) A) and D)
G) C) and D)

Question 7

Which one adaptation was most important in enabling animals to reproduce on land?

Accepted Answer

A)   penis
B)   shelled egg with extraembryonic membranes
C)   placenta
D)   gametes
E)   copulationF) D) and E)
G) C) and D) B

Question 8

Which of the listed embryonic stages is the earliest?

Accepted Answer

A)   gastrula
B)   blastocyst
C)   neurula
D)   morula
E)   8-cell stageF) A) and E)
G) C) and D)

Question 9

Which of these does not contribute significantly to the contents of the semen?

Accepted Answer

A)   testis
B)   seminal vesicle
C)   urethra
D)   prostate gland
E)   bulbourethral glandF) A) and B)
G) All of the above

Question 10

What is the extraembryonic membrane that serves as the first site of blood cell formation for the embryo?

Accepted Answer

A)   chorion
B)   allantois
C)   amnion
D)   yolk sac
E)   zona pellucidaF) A) and E)
G) A) and C)

Question 11

Which STD is caused by a protozoan?

Accepted Answer

A)   chlamydia
B)   genital herpes
C)   trichomoniasis
D)   gonorrhea
E)   hepatitisF) A) and E)
G) A) and D)

Question 12

Sperm mature in the

Accepted Answer

A)   prostate gland.
B)   testis.
C)   penis.
D)   vas deferens.
E)   epididymis.F) A) and E)
G) A) and B)

Question 13

A birth control pill works by

Accepted Answer

A)   inhibiting FSH and LH production.
B)   making the woman's reproductive tract toxic to sperm.
C)   stimulating FSH and LH production.
D)   destroying the endometrium.
E)   immunizing the woman against human chorionic gonadotropin hCG) .F) A) and B)
G) B) and C)

Question 14

Which of these is mismatched?

Accepted Answer

A)   ovulation - luteinizing hormone LH)  peaks
B)   menstruation - follicle-stimulating hormone FSH)  peaks
C)   secretory phase - progesterone peaks
D)   menstruation - progesterone declines
E)   proliferative phase - estrogen levels riseF) A) and D)
G) D) and E)

Question 15

How does follicle-stimulating hormone FSH)  affect the male reproductive system?

Accepted Answer

A)   promotes testosterone production
B)   causes erection
C)   promotes spermatogenesis
D)   stimulates ovulation
E)   triggers ejaculationF) B) and D)
G) B) and C)

Question 16

The second half of the ovarian cycle is termed the _____ phase.

Accepted Answer

A)   ovulatory
B)   follicular
C)   luteal
D)   menstrual
E)   menopausalF) C) and D)
G) B) and E)

Question 17

Which lifestyle is most likely to lead to infertility in a male?

Accepted Answer

A)   a man who is a semiprofessional athlete
B)   a man who works as a computer programmer and sits at a desk the majority of the day
C)   a man who works as a mechanic
D)   a man who works for a company that applies pesticides to lawns
E)   a man who works as a teacherF) B) and D)
G) B) and C)

Question 18

In the figure shown here, which of the following is the bulbourethral gland?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) B) and E)
G) A) and D)

Question 19

Which of the following structures does not belong to the reproductive system?

Accepted Answer

A)   oviduct
B)   ovary
C)   cervix
D)   bladder
E)   vaginaF) B) and E)
G) B) and D)

Question 20

The bladder originates from

Accepted Answer

A)   ectoderm only.
B)   mesoderm only.
C)   endoderm only.
D)   both mesoderm and endoderm, but not ectoderm.
E)   ectoderm, mesoderm, and endoderm.F) B) and C)
G) A) and C)

Exam 29: Reproduction and Embryonic Development

In which stage do the three germ layers form?

Correct AnswerverifiedShow Answer

Which of the following mammalian structures is derived from one of the extraembryonic membranes?

Correct AnswerverifiedShow Answer

The failure of a couple to achieve pregnancy after a year of regular, unprotected intercourse is termed

Correct AnswerverifiedD

Which statement is correct about the placenta?

Correct AnswerverifiedShow Answer

An unfertilized egg from a female Komodo dragon may develop directly into a young Komodo dragon. This is an example of

Correct AnswerverifiedC

Which of the following is 100% effective against both pregnancy and STDs?

Correct AnswerverifiedShow Answer

Which one adaptation was most important in enabling animals to reproduce on land?

Correct AnswerverifiedB

Which of the listed embryonic stages is the earliest?

Correct AnswerverifiedShow Answer

Which of these does not contribute significantly to the contents of the semen?

Correct AnswerverifiedShow Answer

What is the extraembryonic membrane that serves as the first site of blood cell formation for the embryo?

Correct AnswerverifiedShow Answer

Which STD is caused by a protozoan?

Correct AnswerverifiedShow Answer

Sperm mature in the

Correct AnswerverifiedShow Answer

A birth control pill works by

Correct AnswerverifiedShow Answer

Which of these is mismatched?

Correct AnswerverifiedShow Answer

How does follicle-stimulating hormone FSH) affect the male reproductive system?

Correct AnswerverifiedShow Answer

The second half of the ovarian cycle is termed the _____ phase.

Correct AnswerverifiedShow Answer

Which lifestyle is most likely to lead to infertility in a male?

Correct AnswerverifiedShow Answer

In the figure shown here, which of the following is the bulbourethral gland?

Correct AnswerverifiedShow Answer

Which of the following structures does not belong to the reproductive system?

Correct AnswerverifiedShow Answer

The bladder originates from

Correct AnswerverifiedShow Answer

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D

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C

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B

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