Question 1

Parthenogenesis, or the development of offspring from unfertilized eggs,

Accepted Answer

A)  is theoretically possible but has never been confirmed in nature 
B)  occurs only in fish. 
C)  depends on cyclical hormonal states in whiptail lizards. 
D)  allows some species to produce only females. 
E)  Both c and d 
A)  is theoretically possible but has never been confirmed in nature 
B)  occurs only in fish. 
C)  depends on cyclical hormonal states in whiptail lizards. 
D)  allows some species to produce only females. 
E)  Both c and d

Question 2

LH and hCG

Accepted Answer

A)  are polypeptide gonadotropins. 
B)  maintain the corpus luteum and stimulate the secretion of progesterone. 
C)  are secreted by the ovary. 
D)  Both a and b 
E)  a, b, and c 
A)  are polypeptide gonadotropins. 
B)  maintain the corpus luteum and stimulate the secretion of progesterone. 
C)  are secreted by the ovary. 
D)  Both a and b 
E)  a, b, and c

Question 3

Which of the following statements about the ovarian and uterine cycles is false?

Accepted Answer

A)  Falling estrogen and progesterone levels induce menstruation. 
B)  A sudden rise in LH induces ovulation. 
C)  Estrogen levels rise in the first half of the ovarian cycle and progesterone levels rise in the second half. 
D)  If fertilization occurs, the corpus luteum secretes hCG. 
E)  Estrogen is produced by follicle cells 
A)  Falling estrogen and progesterone levels induce menstruation. 
B)  A sudden rise in LH induces ovulation. 
C)  Estrogen levels rise in the first half of the ovarian cycle and progesterone levels rise in the second half. 
D)  If fertilization occurs, the corpus luteum secretes hCG. 
E)  Estrogen is produced by follicle cells

Question 4

_______ is a specialized type of asexual reproduction in which offspring develop from unfertilized eggs.

Accepted Answer

The answer of _______ is a specialized type of asexual...

Question 5

Use the following to answer questions:
Match the cell stages listed below with the description of a cell in each question that follows. Each item may be used once, more than once, or not at all. 
-First essential haploid germ cell produced during oogenesis

Accepted Answer

A)  Second polar body 
B)  Primary oocyte 
C)  Secondary oocyte 
D)  First polar body 
E)  Ootid 
A)  Second polar body 
B)  Primary oocyte 
C)  Secondary oocyte 
D)  First polar body 
E)  Ootid

Question 6

The term "dioecious" refers to

Accepted Answer

A)  patterns of inheritance. 
B)  circulatory physiology. 
C)  patterns of cleavage in developing embryos. 
D)  the evolutionary origin of species. 
E)  separate male and female reproductive systems. 
A)  patterns of inheritance. 
B)  circulatory physiology. 
C)  patterns of cleavage in developing embryos. 
D)  the evolutionary origin of species. 
E)  separate male and female reproductive systems.

Question 7

Use the following to answer questions:
Refer to the graph below, depicting the average blood concentrations of three circulating hormones in 100 healthy adult women. Each hormone plays a role in regulating some aspect of the ovarian and/or uterine cycle.  
-Based on the graph, which of the following statements is true?

Accepted Answer

A)  Curve A represents estrogen levels. 
B)  Curve B represents progesterone levels. 
C)  Curve C represents a hormone secreted from the anterior pituitary gland. 
D)  Curve C represents a hormone that is produced by the corpus luteum. 
E)  Both a and d 
A)  Curve A represents estrogen levels. 
B)  Curve B represents progesterone levels. 
C)  Curve C represents a hormone secreted from the anterior pituitary gland. 
D)  Curve C represents a hormone that is produced by the corpus luteum. 
E)  Both a and d

Question 8

The uterus opens into the vagina at a muscular necklike region called the _______.

Accepted Answer

The answer of The uterus opens into the vagina at...

Question 9

Injections of which of the following hormones will induce labor in a pregnant woman?

Accepted Answer

A)  Estrogen 
B)  Human chorionic gonadotropin 
C)  Progesterone 
D)  Oxytocin 
E)  Prolactin 
A)  Estrogen 
B)  Human chorionic gonadotropin 
C)  Progesterone 
D)  Oxytocin 
E)  Prolactin

Question 10

An important difference between a sperm and an egg concerns

Accepted Answer

A)  their size. 
B)  the amount of cytoplasm they contain. 
C)  whether or not they are motile. 
D)  whether or not protective layers exist outside the plasma membrane. 
E)  All of the above 
A)  their size. 
B)  the amount of cytoplasm they contain. 
C)  whether or not they are motile. 
D)  whether or not protective layers exist outside the plasma membrane. 
E)  All of the above

Question 11

For approximately how long during the human female's menstrual cycle are progesterone concentrations high enough to maintain the uterus in a proper condition for pregnancy?

Accepted Answer

A)  The entire duration of the cycle 
B)  No portion of the cycle 
C)  During the first half of the cycle 
D)  During the second half of the cycle 
E)  For a 5-day window mid-cycle 
A)  The entire duration of the cycle 
B)  No portion of the cycle 
C)  During the first half of the cycle 
D)  During the second half of the cycle 
E)  For a 5-day window mid-cycle

Question 12

Spontaneous abortions

Accepted Answer

A)  typically occur late in pregnancy. 
B)  nearly always follow a pregnancy that has been painful. 
C)  often occur before the woman even knows she is pregnant. 
D)  are another name for therapeutic abortions. 
E)  None of the above 
A)  typically occur late in pregnancy. 
B)  nearly always follow a pregnancy that has been painful. 
C)  often occur before the woman even knows she is pregnant. 
D)  are another name for therapeutic abortions. 
E)  None of the above

Question 13

If you were to discover a mutation in sea urchins that caused them to produce eggs with an overly dense vitelline envelope, what would you expect to see if you fertilized these eggs with normal sperm?

Accepted Answer

A)  Polyspermy 
B)  A thicker zona pellucid than normal 
C)  The formation of multiple identical quadruplets from the fertilized egg 
D)  A failure of normal sperm to fertilize these eggs 
E)  All of the above 
A)  Polyspermy 
B)  A thicker zona pellucid than normal 
C)  The formation of multiple identical quadruplets from the fertilized egg 
D)  A failure of normal sperm to fertilize these eggs 
E)  All of the above

Question 14

Birth control pills containing progesterone are designed to block the normal progression of

Accepted Answer

A)  the uterine cycle. 
B)  spermatogenesis. 
C)  implantation. 
D)  production of a primary oocyte. 
E)  the ovarian cycle. 
A)  the uterine cycle. 
B)  spermatogenesis. 
C)  implantation. 
D)  production of a primary oocyte. 
E)  the ovarian cycle.

Question 15

Which statement about human oocytes is true?

Accepted Answer

A)  By birth, the human female infant has produced a lifetime supply of oocytes. 
B)  At the onset of puberty, ovarian follicles produce new oocytes in response to hormonal stimulation. 
C)  At the onset of menopause, a woman stops producing oocytes. 
D)  Oocytes are produced by a woman throughout adolescence. 
E)  Oocytes produced by a woman are stored in the oviducts. 
A)  By birth, the human female infant has produced a lifetime supply of oocytes. 
B)  At the onset of puberty, ovarian follicles produce new oocytes in response to hormonal stimulation. 
C)  At the onset of menopause, a woman stops producing oocytes. 
D)  Oocytes are produced by a woman throughout adolescence. 
E)  Oocytes produced by a woman are stored in the oviducts.

Question 16

In humans, fertilization typically occurs when the egg is located in the _______.

Accepted Answer

The answer of In humans, fertilization typically occurs when the...

Question 17

Spermatogenesis

Accepted Answer

A)  results in two sperm cells from each primary spermatocyte. 
B)  involves a period of arrest during the first meiotic division. 
C)  results in diploid gametes. 
D)  apportions cytoplasm equally among resulting cells. 
E)  apportions cytoplasm unequally among resulting cells. 
A)  results in two sperm cells from each primary spermatocyte. 
B)  involves a period of arrest during the first meiotic division. 
C)  results in diploid gametes. 
D)  apportions cytoplasm equally among resulting cells. 
E)  apportions cytoplasm unequally among resulting cells.

Question 18

Among the methods of contraception listed below, which has the lowest failure rate?

Accepted Answer

A)  Vaginal ring 
B)  Rhythm method 
C)  Diaphragm 
D)  Coitus interruptus 
E)  Condom 
A)  Vaginal ring 
B)  Rhythm method 
C)  Diaphragm 
D)  Coitus interruptus 
E)  Condom

Question 19

Hermaphrodites are organisms that

Accepted Answer

A)  possess both male and female reproductive systems. 
B)  breed for a time as one sex and then breed as the other. 
C)  develop offspring from unfertilized eggs. 
D)  usually fertilize themselves. 
E)  have abnormal reproductive organs. 
A)  possess both male and female reproductive systems. 
B)  breed for a time as one sex and then breed as the other. 
C)  develop offspring from unfertilized eggs. 
D)  usually fertilize themselves. 
E)  have abnormal reproductive organs.

Question 20

Which of the following statements is true?

Accepted Answer

A)  Asexual reproduction involves an inefficient use of resources. 
B)  Sexually reproducing species are found in relatively constant environments where genetic diversity is relatively unimportant. 
C)  Because it is produced by meiosis, a bud is genetically distinct from the parent. 
D)  Only damaged tissues or lost limbs can be replaced by regeneration. 
E)  In some species, parthenogenesis requires sexual behavior, courtship displays, and mating. 
A)  Asexual reproduction involves an inefficient use of resources. 
B)  Sexually reproducing species are found in relatively constant environments where genetic diversity is relatively unimportant. 
C)  Because it is produced by meiosis, a bud is genetically distinct from the parent. 
D)  Only damaged tissues or lost limbs can be replaced by regeneration. 
E)  In some species, parthenogenesis requires sexual behavior, courtship displays, and mating.

Exam 43: Animal Reproduction

Parthenogenesis, or the development of offspring from unfertilized eggs,

LH and hCG

Which of the following statements about the ovarian and uterine cycles is false?

_______ is a specialized type of asexual reproduction in which offspring develop from unfertilized eggs.

Use the following to answer questions: Match the cell stages listed below with the description of a cell in each question that follows. Each item may be used once, more than once, or not at all. -First essential haploid germ cell produced during oogenesis

The term "dioecious" refers to

The uterus opens into the vagina at a muscular necklike region called the _______.

Injections of which of the following hormones will induce labor in a pregnant woman?

An important difference between a sperm and an egg concerns

For approximately how long during the human female's menstrual cycle are progesterone concentrations high enough to maintain the uterus in a proper condition for pregnancy?

Spontaneous abortions

If you were to discover a mutation in sea urchins that caused them to produce eggs with an overly dense vitelline envelope, what would you expect to see if you fertilized these eggs with normal sperm?

Birth control pills containing progesterone are designed to block the normal progression of

Which statement about human oocytes is true?

In humans, fertilization typically occurs when the egg is located in the _______.

Spermatogenesis

Among the methods of contraception listed below, which has the lowest failure rate?

Hermaphrodites are organisms that

Which of the following statements is true?

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