Question 1

You notice that in your aquarium, previously full of undoubtedly male fish, one is laying eggs.Upon a bit of research, you find out that the species of fish you purchased is a sequential hermaphrodite.Which of the following is true?

Accepted Answer

A)  One of the male fish underwent protandry and became a female.
B)  One of the male fish fertilized its own eggs.
C)  Since the fish are hermaphrodites, one of the male fish laid eggs and another will likely fertilize them.
D)  The fish have parthenogenesis, therefore their eggs do not have to be fertilized to be viable.E) C) and D)
F) B) and D)

Question 2

What is the most commonly employed form of birth control in the United States?

Accepted Answer

A)  abstinence
B)  prevention of ovulation by hormonal inhibition
C)  sperm blockage with condoms
D)  sterilizationE) B) and D)
F) All of the above

Question 3

What are the only mammals that lay eggs?

Accepted Answer

A)  monotremes
B)  placentals
C)  marsupialsD) A) and B)
E) A) and C)

Question 4

Which of the following have young which feed on milk?

Accepted Answer

A)  marsupials
B)  monotremes
C)  placental mammals
D)  placental mammals and marsupials
E)  placental mammals, marsupials, and monotremesF) A) and E)
G) D) and E)

Question 5

The scrotum is a sac-like structure outside the abdomen in which the testes are suspended.Why is this structure essential?

Accepted Answer

A)  Sperm must be closer to the penis to be ejaculated.
B)  There is not enough space in the abdomen to grow properly.
C)  Lower temperature is required for normal development of sperm.
D)  There is too much hormonal influence if they remain in the abdomen.E) A) and B)
F) A) and C)

Question 6

An adult male produces sperm continuously by meiotic division of cells lining what structure?

Accepted Answer

A)  Malpighian tubules
B)  Fallopian tubules
C)  seminiferous tubules
D)  epididymis tubulesE) B) and C)
F) A) and C)

Question 7

Which hormone prevents the corpus luteum from degenerating?

Accepted Answer

A)  LH
B)  FSH
C)  hCG
D)  progesteroneE) None of the above
F) All of the above

Question 8

How do birth control pills prevent fertilization?

Accepted Answer

A)  They alter the uterine environment so that sperm cannot survive.
B)  They prevent follicle development and ovulation.
C)  The provide hCG, indicating that fertilization has already occurred.
D)  They inhibit menstruation.E) None of the above
F) B) and D)

Question 9

With help from fertility specialists, a woman with very low follicle-stimulating hormone and luteinizing hormone levels finally conceives a son.If her genetic condition is from a dominant allele and is passed on to her son, what is the likely result?

Accepted Answer

A)  He may have fertility problems as well.
B)  He is likely to have more sons than daughters.
C)  He will be fine, but his daughters will have a 50% chance of fertility problems.
D)  As a male, he will neither express nor pass on these genes.E) C) and D)
F) A) and C)

Question 10

Some internally fertilized eggs develop and hatch outside the mother's body.What is this developmental strategy called?

Accepted Answer

A)  oviparity
B)  placental development
C)  marsupial development
D)  viviparyE) C) and D)
F) A) and B)

Question 11

What hormone is tested for in pregnancy tests?

Accepted Answer

A)  estrogen hormone
B)  luteinizing hormone
C)  follicle stimulation hormone
D)  progesterone hormone
E)  hCG hormoneF) D) and E)
G) None of the above

Question 12

Which type of fish is likely to produce the smallest number of progeny from each mating?

Accepted Answer

A)  An oviparous species
B)  An ovoviparous species
C)  A viviparous speciesD) None of the above
E) All of the above

Question 13

An extremely rare occurrence in humans is a multiple pregnancy with the embryos at different stages due to fertilization weeks apart.What mechanism normally prevents this from happening?

Accepted Answer

A)  The embryo's secretion of FSH and LH maintains the corpus luteum, keeping estradiol and progesterone high until the placenta takes over secretion of these hormones.
B)  The embryo's secretion of GnRH maintains the corpus luteum, keeping FSH and LH high until the placenta takes over secretion of these hormones.
C)  The embryo's secretion of hCG maintains the corpus luteum, keeping estradiol and progesterone high until the placenta takes over secretion of these hormones.
D)  The follicle's secretion of polar bodies maintains the fimbriae, keeping estradiol and progesterone high until the fallopian tube takes over secretion of these hormones.E) B) and C)
F) C) and D)

Question 14

What process is absent in mammals with an estrous cycle?

Accepted Answer

A)  oogenesis
B)  homeostasis
C)  ovulation
D)  menstruationE) All of the above
F) None of the above

Question 15

You have discovered a new invertebrate species that is slow-moving and widely dispersed.What might you predict about its reproductive system?

Accepted Answer

A)  Males are likely to be smaller than females.
B)  Females are likely to be smaller than males.
C)  It is likely to use internal fertilization and brood care.
D)  It is likely to be hermaphroditic.E) B) and C)
F) None of the above

Question 16

The sperm head encloses a compact nucleus and is capped by a vesicle called what?

Accepted Answer

A)  Sertoli cell
B)  flagellum
C)  acrosome
D)  vas deferensE) B) and C)
F) A) and B)

Question 17

Internally fertilized organisms can either be born alive, or emerge from what structures?

Accepted Answer

A)  follicles
B)  ducts
C)  capsules
D)  eggsE) All of the above
F) B) and D)

Question 18

What term describes avoidance of reproduction without giving up sexual intercourse?

Accepted Answer

A)  abstinence
B)  the rhythm method
C)  asexual reproduction
D)  contraceptionE) B) and C)
F) All of the above

Question 19

What special feature of the ovum is facilitated by the production of polar bodies?

Accepted Answer

A)  large size of the cell
B)  extra layers of plasma membrane
C)  triploidy
D)  large size of the nucleusE) None of the above
F) C) and D)

Question 20

What was the most important adaptation of the reptiles and birds to life on land?

Accepted Answer

A)  the shelled egg
B)  the amniotic egg
C)  the external egg
D)  the impermeable eggE) A) and B)
F) A) and C)

Exam 52: The Reproductive System

You notice that in your aquarium, previously full of undoubtedly male fish, one is laying eggs.Upon a bit of research, you find out that the species of fish you purchased is a sequential hermaphrodite.Which of the following is true?

Correct AnswerverifiedShow Answer

Some internally fertilized eggs develop and hatch outside the mother's body.What is this developmental strategy called?

Correct AnswerverifiedShow Answer

Internally fertilized organisms can either be born alive, or emerge from what structures?

Correct AnswerverifiedShow Answer

Which of the following have young which feed on milk?

Correct AnswerverifiedShow Answer

Which type of fish is likely to produce the smallest number of progeny from each mating?

Correct AnswerverifiedShow Answer

An adult male produces sperm continuously by meiotic division of cells lining what structure?

Correct AnswerverifiedShow Answer

How do birth control pills prevent fertilization?

Correct AnswerverifiedShow Answer

What are the only mammals that lay eggs?

Correct AnswerverifiedShow Answer

The sperm head encloses a compact nucleus and is capped by a vesicle called what?

Correct AnswerverifiedShow Answer

The scrotum is a sac-like structure outside the abdomen in which the testes are suspended.Why is this structure essential?

Correct AnswerverifiedShow Answer

You have discovered a new invertebrate species that is slow-moving and widely dispersed.What might you predict about its reproductive system?

Correct AnswerverifiedShow Answer

What is the most commonly employed form of birth control in the United States?

Correct AnswerverifiedShow Answer

What special feature of the ovum is facilitated by the production of polar bodies?

Correct AnswerverifiedShow Answer

What was the most important adaptation of the reptiles and birds to life on land?

Correct AnswerverifiedShow Answer

An extremely rare occurrence in humans is a multiple pregnancy with the embryos at different stages due to fertilization weeks apart.What mechanism normally prevents this from happening?

Correct AnswerverifiedShow Answer

What term describes avoidance of reproduction without giving up sexual intercourse?

Correct AnswerverifiedShow Answer

What process is absent in mammals with an estrous cycle?

Correct AnswerverifiedShow Answer

What hormone is tested for in pregnancy tests?

Correct AnswerverifiedShow Answer

With help from fertility specialists, a woman with very low follicle-stimulating hormone and luteinizing hormone levels finally conceives a son.If her genetic condition is from a dominant allele and is passed on to her son, what is the likely result?

Correct AnswerverifiedShow Answer

Which hormone prevents the corpus luteum from degenerating?

Correct AnswerverifiedShow Answer

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