Question 1

What is often -- but not always -- a feature that accompanies the evolution of internal fertilization?

Accepted Answer

A)  meiotically-produced oocytes
B)  synchronized gamete release in a population
C)  fusion of egg and sperm within the female
D)  a male intromittent organ In internal fertilization, the oocyte is always retained.The population no longer has to synchronize gamete release.Male intromittent organs, such as penises, are often used for internal fertilization, but birds lack such a structure and simply align their cloacas.E) All of the above
F) None of the above

Question 2

Select the correct pair of statements about FSH and LH function.

Accepted Answer

A)  In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum.
B)  In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles.
C)  In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum.
D)  In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles.E) A) and B)
F) A) and C)

Question 3

Terrestrial vertebrates and some fish evolved a form of fertilization in which the male gametes are introduced into the female reproductive tract.What is this called?

Accepted Answer

A)  synchronous fertilization
B)  external fertilization
C)  internal fertilization
D)  asexual fertilizationE) A) and D)
F) C) and D)

Question 4

You are doing veterinary research on dog hormones.In your set of blood samples, you have one male dog with abnormally high levels of follicle-stimulating hormone and luteinizing hormone.What do you suspect may be the explanation for this outlier?

Accepted Answer

A)  The dog had been neutered.
B)  The dog was a female, not a male.
C)  The dog had its pituitary gland removed.
D)  The dog had a hypothalamic problem causing low levels of gonadotropin-releasing hormone (GnRH) .E) C) and D)
F) None of the above A

Question 5

Select the correct sequence of events of the human menstrual phase, beginning and ending with the menstrual cycle.

Accepted Answer

A)  menstrual phase  →\rightarrow→  proliferative phase  →\rightarrow→  ovulation  →\rightarrow→  secretory phase  →\rightarrow→  menstrual phase
B)  menstrual phase  →\rightarrow→  ovulation  →\rightarrow→  secretory phase  →\rightarrow→ proliferative phase  →\rightarrow→  menstrual phase
C)  menstrual phase  →\rightarrow→  secretory phase  →\rightarrow→  proliferative phase  →\rightarrow→ ovulation  →\rightarrow→ menstrual phase
D)  menstrual phase  →\rightarrow→  proliferative phase  →\rightarrow→  secretory phase  →\rightarrow→ ovulation  →\rightarrow→  menstrual phase E) A) and B)
F) B) and C)

Question 6

Select the correct statement regarding the human female reproductive system.

Accepted Answer

A)  The ovarian fimbria is the functional unit of the ovary.
B)  The granulosa cells secrete testosterone, which triggers menarche.
C)  The Fallopian tubes transport ova from the ovary to the uterus.
D)  The cervix contains corpora cavernosa tissue, which is a type of erectile tissue.E) A) and B)
F) A) and C)

Question 7

In humans, which embryonic tissues are "indifferent"?

Accepted Answer

A)  vertebral columns
B)  brain stems
C)  adrenal glands
D)  spinal cords
E)  gonadsF) D) and E)
G) A) and B)

Question 8

Which is a correct description of hormone action?

Accepted Answer

A)  FSH stimulates Leydig cells in the testes.
B)  LH stimulates Sertoli cells in the testes.
C)  Testosterone stimulates corpus luteum.
D)  GnRH stimulates the anterior pituitary gland.E) B) and C)
F) A) and D) D

Question 9

What is the term for organisms in which internally-fertilized eggs are laid to develop and hatch outside the mother's body?

Accepted Answer

A)  placental
B)  viviparous
C)  oviparous
D)  marsupialE) A) and B)
F) A) and C) C

Question 10

Major extinctions of dinosaurs are associated with large meteor impacts, including the final extinction that wiped them out at the Cretaceous-Tertiary boundary.The particulate matter that would have arisen as a result of impact would have entered the atmosphere and had secondary impacts.Some scientists believe that a fundamental difference between mammals and dinosaurs allowed mammals to survive this event, but doomed the dinosaurs.What may have characterized the last generation of dinosaurs as they went extinct?

Accepted Answer

A)  Lungs clogged with dust.
B)  Highly skewed sex ratios.
C)  Hormonal disruptions due to contaminated water.
D)  Weak eggshells due to radiation.E) All of the above
F) A) and B)

Question 11

What stimulates ovulation?

Accepted Answer

A)  Estradiol
B)  FSH
C)  LH
D)  TestosteroneE) None of the above
F) A) and B)

Question 12

Why did internal fertilization likely evolve?

Accepted Answer

A)  To increase the chances of successful fertilization.
B)  As a response to copulation.
C)  Because there were no safe places to lay eggs.
D)  As an adaptation to life in a terrestrial environment.E) B) and C)
F) None of the above

Question 13

Vertebrates that practice internal fertilization employ three strategies for embryonic and fetal development.In one strategy, the female retains the eggs within her body and the young are fully developed when they hatch inside of her.What is this called?

Accepted Answer

A)  oviparity
B)  ovoviviparity
C)  viviparity
D)  protogynyE) B) and D)
F) A) and D)

Question 14

Ovoviviparity is found in

Accepted Answer

A)  reptiles.
B)  birds.
C)  mammals.
D)  mollies and guppies.E) A) and D)
F) B) and D)

Question 15

According to the figure, what is occurring during day 2?

Accepted Answer

A)  ovulation
B)  release of corpus luteum
C)  menstruation
D)  luteal regressionE) A) and C)
F) A) and B)

Question 16

If a mutant organism used mitosis to produce gametes, what would be the result of mating with a wildtype partner?

Accepted Answer

A)  Progeny would be quadraploid, and almost certainly nonviable.
B)  Progeny would be triploid, and almost certainly nonviable.
C)  Progeny would be normal -- this is a common occurrence in some phyla.
D)  The resulting progeny would be identical twins.E) A) and C)
F) A) and B)

Question 17

A marine aquarium has been hoping to breed some endangered species in its intertidal zone tank, but has been unsuccessful.Their new student intern, who is taking Introductory Biology at the local university, suggested raising the water level.It worked! Several species spawned and the aquarists are thrilled.What is the best explanation for the behavioral response?

Accepted Answer

A)  The added water diluted pheromones that built up in the tank over time, signaling over-crowding.
B)  The added water mimicked the higher tide that occurs monthly, which many marine animals use to synchronize their reproduction.
C)  It worked, but for a poor reason -- the chlorine in the poorly-prepared water was harmful to the animals, and they engaged in "last chance" mating in case they might die.
D)  The added water led to proliferation of algae and plankton, signaling an abundance of food that could support small fry and larvae.E) A) and B)
F) A) and C)

Question 18

Which is a correct statement about reptile reproduction compared to bird reproduction?

Accepted Answer

A)  Birds are oviparous, reptiles are ovoviviparous.
B)  Both newly hatched birds and reptiles require parental care.
C)  Both exhibit external fertilization.
D)  The eggs of both birds and reptiles have protective shells.E) B) and C)
F) None of the above

Question 19

There are numerous fish genera that have individuals that can change their sex during their lifetime.What is this called?

Accepted Answer

A)  sequential hermaphroditism
B)  sequential sex determination
C)  sequential parthenogenesis
D)  sequential production of gametesE) None of the above
F) B) and D)

Question 20

Ovulation occurs by a surge in the secretion of what hormone?

Accepted Answer

A)  estrogen hormone
B)  luteinizing hormone
C)  follicle stimulation hormone
D)  progesterone hormoneE) A) and B)
F) None of the above

Exam 52: The Reproductive System

What is often -- but not always -- a feature that accompanies the evolution of internal fertilization?

Correct Answer
verified

Select the correct pair of statements about FSH and LH function.

Correct Answer
verified

Terrestrial vertebrates and some fish evolved a form of fertilization in which the male gametes are introduced into the female reproductive tract.What is this called?

Correct Answer
verified

You are doing veterinary research on dog hormones.In your set of blood samples, you have one male dog with abnormally high levels of follicle-stimulating hormone and luteinizing hormone.What do you suspect may be the explanation for this outlier?

Correct Answer
verified
A

Select the correct sequence of events of the human menstrual phase, beginning and ending with the menstrual cycle.

Correct Answer
verified

Select the correct statement regarding the human female reproductive system.

Correct Answer
verified

In humans, which embryonic tissues are "indifferent"?

Correct Answer
verified

Which is a correct description of hormone action?

Correct Answer
verified
D

What is the term for organisms in which internally-fertilized eggs are laid to develop and hatch outside the mother's body?

Correct Answer
verified
C

Correct Answer
verified

What stimulates ovulation?

Correct Answer
verified

Why did internal fertilization likely evolve?

Correct Answer
verified

Vertebrates that practice internal fertilization employ three strategies for embryonic and fetal development.In one strategy, the female retains the eggs within her body and the young are fully developed when they hatch inside of her.What is this called?

Correct Answer
verified

Ovoviviparity is found in

Correct Answer
verified

According to the figure, what is occurring during day 2?

Correct Answer
verified

If a mutant organism used mitosis to produce gametes, what would be the result of mating with a wildtype partner?

Correct Answer
verified

Correct Answer
verified

Which is a correct statement about reptile reproduction compared to bird reproduction?

Correct Answer
verified

There are numerous fish genera that have individuals that can change their sex during their lifetime.What is this called?

Correct Answer
verified

Ovulation occurs by a surge in the secretion of what hormone?

Correct Answer
verified

Exam 52: The Reproductive System

What is often -- but not always -- a feature that accompanies the evolution of internal fertilization?

Correct AnswerverifiedShow Answer

Select the correct pair of statements about FSH and LH function.

Correct AnswerverifiedShow Answer

Terrestrial vertebrates and some fish evolved a form of fertilization in which the male gametes are introduced into the female reproductive tract.What is this called?

Correct AnswerverifiedShow Answer

You are doing veterinary research on dog hormones.In your set of blood samples, you have one male dog with abnormally high levels of follicle-stimulating hormone and luteinizing hormone.What do you suspect may be the explanation for this outlier?

Correct AnswerverifiedA

Select the correct sequence of events of the human menstrual phase, beginning and ending with the menstrual cycle.

Correct AnswerverifiedShow Answer

Select the correct statement regarding the human female reproductive system.

Correct AnswerverifiedShow Answer

In humans, which embryonic tissues are "indifferent"?

Correct AnswerverifiedShow Answer

Which is a correct description of hormone action?

Correct AnswerverifiedD

What is the term for organisms in which internally-fertilized eggs are laid to develop and hatch outside the mother's body?

Correct AnswerverifiedC

Correct AnswerverifiedShow Answer

What stimulates ovulation?

Correct AnswerverifiedShow Answer

Why did internal fertilization likely evolve?

Correct AnswerverifiedShow Answer

Vertebrates that practice internal fertilization employ three strategies for embryonic and fetal development.In one strategy, the female retains the eggs within her body and the young are fully developed when they hatch inside of her.What is this called?

Correct AnswerverifiedShow Answer

Ovoviviparity is found in

Correct AnswerverifiedShow Answer

According to the figure, what is occurring during day 2?

Correct AnswerverifiedShow Answer

If a mutant organism used mitosis to produce gametes, what would be the result of mating with a wildtype partner?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which is a correct statement about reptile reproduction compared to bird reproduction?

Correct AnswerverifiedShow Answer

There are numerous fish genera that have individuals that can change their sex during their lifetime.What is this called?

Correct AnswerverifiedShow Answer

Ovulation occurs by a surge in the secretion of what hormone?

Correct AnswerverifiedShow Answer

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A

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D

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C

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