Question 1

Parthenogenesis

Accepted Answer

A)  is theoretically possible but has never been confirmed in nature. 
B)  occurs only in fish. 
C)  is the development of offspring from unfertilized eggs. 
D)  allows some species to produce only males. 
E)  occurs in tammar wallabies. 
A)  is theoretically possible but has never been confirmed in nature. 
B)  occurs only in fish. 
C)  is the development of offspring from unfertilized eggs. 
D)  allows some species to produce only males. 
E)  occurs in tammar wallabies.

Question 2

In many species of birds, males lack a penis.Which statement about the reproductive process of these birds is true?

Accepted Answer

A)  They cannot engage in internal fertilization. 
B)  They deposit sperm packets in the environment, where they are retrieved by a female and used to fertilize her eggs. 
C)  They engage in internal fertilization but without an accessory sex organ. 
D)  They engage in indirect sperm transfer. 
E)  Their offspring develop via parthenogenesis. 
A)  They cannot engage in internal fertilization. 
B)  They deposit sperm packets in the environment, where they are retrieved by a female and used to fertilize her eggs. 
C)  They engage in internal fertilization but without an accessory sex organ. 
D)  They engage in indirect sperm transfer. 
E)  Their offspring develop via parthenogenesis.

Question 3

Which statement describes a characteristic of a 28-day human uterine cycle?

Accepted Answer

A)  The endometrium reaches maximum thickness around the day of ovulation. 
B)  Increased production of hormones by the corpus luteum prompts menstruation. 
C)  Menstruation occurs during the last 5 days. 
D)  It is regulated by estrogen and progesterone from the ovaries. 
E)  Ovulation stimulates the breakdown of the endometrium. 
A)  The endometrium reaches maximum thickness around the day of ovulation. 
B)  Increased production of hormones by the corpus luteum prompts menstruation. 
C)  Menstruation occurs during the last 5 days. 
D)  It is regulated by estrogen and progesterone from the ovaries. 
E)  Ovulation stimulates the breakdown of the endometrium.

Question 4

In the mammalian ovary, granulosa cells of the follicle are stimulated by follicle-stimulating hormone (FSH) to grow and mature.Granulosa cells are therefore similar to

Accepted Answer

A)  thecal cells of the follicle. 
B)  Leydig cells in the testes of males. 
C)  endometrial cells. 
D)  Sertoli cells in the testes of males. 
E)  cells of the corpus luteum. 
A)  thecal cells of the follicle. 
B)  Leydig cells in the testes of males. 
C)  endometrial cells. 
D)  Sertoli cells in the testes of males. 
E)  cells of the corpus luteum.

Question 5

A fertility specialist advises her male patient to switch from wearing tight briefs to loose-fitting boxers because _______ occurs optimally at temperatures lower than normal body temperature.

Accepted Answer

The answer of A fertility specialist advises her male patient...

Question 6

Which sequence represents the route by which sperm travel through the male reproductive tract?

Accepted Answer

A)  Epididymis, seminiferous tubules, vas deferens, urethra 
B)  Seminal vesicles, epididymis, vas deferens, urethra 
C)  Seminiferous tubules, epididymis, vas deferens, ejaculatory duct, urethra 
D)  Seminal vesicles, seminiferous tubules, epididymis, vas deferens, urethra 
E)  Seminiferous tubules, vas deferens, epididymis; urethra, ejaculatory duct 
A)  Epididymis, seminiferous tubules, vas deferens, urethra 
B)  Seminal vesicles, epididymis, vas deferens, urethra 
C)  Seminiferous tubules, epididymis, vas deferens, ejaculatory duct, urethra 
D)  Seminal vesicles, seminiferous tubules, epididymis, vas deferens, urethra 
E)  Seminiferous tubules, vas deferens, epididymis; urethra, ejaculatory duct

Question 7

Refer to the figure showing the human male reproductive system.   Based on the figure, which statement is true?

Accepted Answer

A)  While exiting the male, sperm go from point 11 to point 12 to point 3 to point 5. 
B)  The structure shown at point 6 produces a neutralizing and lubricating solution. 
C)  The material shown at point 8 is muscle tissue that contracts to produce an erection. 
D)  Mature sperm are stored in the structure at point 12. 
E)  Seminal fluids are produced by the structures at points 3, 5, 6, and 11. 
A)  While exiting the male, sperm go from point 11 to point 12 to point 3 to point 5. 
B)  The structure shown at point 6 produces a neutralizing and lubricating solution. 
C)  The material shown at point 8 is muscle tissue that contracts to produce an erection. 
D)  Mature sperm are stored in the structure at point 12. 
E)  Seminal fluids are produced by the structures at points 3, 5, 6, and 11.

Question 8

In sea urchin fertilization, the fertilization cone

Accepted Answer

A)  forms when the sperm contacts the jelly coat of an egg. 
B)  prompts the acrosomal reaction. 
C)  brings the sperm head into the egg cytoplasm. 
D)  initiates the polymerization of actin in the head of the sperm. 
E)  prompts formation of the acrosomal process. 
A)  forms when the sperm contacts the jelly coat of an egg. 
B)  prompts the acrosomal reaction. 
C)  brings the sperm head into the egg cytoplasm. 
D)  initiates the polymerization of actin in the head of the sperm. 
E)  prompts formation of the acrosomal process.

Question 9

Refer to the figure showing the human male reproductive system.   Based on the figure, which statement is true?

Accepted Answer

A)  The structure at point 7 is cut in a vasectomy. 
B)  The structure at point 11 is the ejaculatory duct. 
C)  The structure at point 7 joins the bladder. 
D)  The structure at point 5 contributes an acidic fluid that makes up about 30 percent of the volume of semen. 
E)  The structure at point 6 is the seminal vesicle, which contributes fructose to the semen. 
A)  The structure at point 7 is cut in a vasectomy. 
B)  The structure at point 11 is the ejaculatory duct. 
C)  The structure at point 7 joins the bladder. 
D)  The structure at point 5 contributes an acidic fluid that makes up about 30 percent of the volume of semen. 
E)  The structure at point 6 is the seminal vesicle, which contributes fructose to the semen.

Question 10

Most mammalian females (though not humans) have a period of sexual receptivity called _______.

Accepted Answer

The answer of Most mammalian females (though not humans) have...

Question 11

Refer to the figure showing oogenesis.   In the figure, the first haploid cell(s) is/are labeled _______.

Accepted Answer

The answer of Refer to the figure showing oogenesis. ...

Question 12

The _______ cycles of most mammals, other than humans, do not include _______.

Accepted Answer

A)  uterine; buildup of the endometrium 
B)  uterine; menstruation 
C)  ovarian; formation of a corpus luteum 
D)  reproductive; a distinct period of sexual receptivity 
E)  uterine; a surge in luteinizing hormone (LH) before ovulation 
A)  uterine; buildup of the endometrium 
B)  uterine; menstruation 
C)  ovarian; formation of a corpus luteum 
D)  reproductive; a distinct period of sexual receptivity 
E)  uterine; a surge in luteinizing hormone (LH) before ovulation

Question 13

Which characteristic is typical of ovoviviparity?

Accepted Answer

A)  Egg laying 
B)  Retention of fertilized eggs in the female reproductive tract until hatching 
C)  Reliance of young on nourishment primarily from the mother's placenta 
D)  External fertilization 
E)  Presence in most mammals 
A)  Egg laying 
B)  Retention of fertilized eggs in the female reproductive tract until hatching 
C)  Reliance of young on nourishment primarily from the mother's placenta 
D)  External fertilization 
E)  Presence in most mammals

Question 14

You discover a mutation in sea urchins that causes females to produce eggs lacking bindin receptors on the vitelline envelope.What would you expect to see if you exposed these eggs to normal sea urchin sperm?

Accepted Answer

A)  Polyspermy 
B)  A thicker zona pellucida than normal 
C)  The sperm taking longer to reach the underlying jelly coat 
D)  The inability of the normal sperm to fertilize the eggs 
E)  Faster formation of the fertilization cone 
A)  Polyspermy 
B)  A thicker zona pellucida than normal 
C)  The sperm taking longer to reach the underlying jelly coat 
D)  The inability of the normal sperm to fertilize the eggs 
E)  Faster formation of the fertilization cone

Question 15

Pregnancy tests that can be done at home detect the presence of

Accepted Answer

A)  luteinizing hormone. 
B)  follicle-stimulating hormone. 
C)  human chorionic gonadotropin. 
D)  estrogen. 
E)  progesterone. 
A)  luteinizing hormone. 
B)  follicle-stimulating hormone. 
C)  human chorionic gonadotropin. 
D)  estrogen. 
E)  progesterone.

Question 16

For women, the earliest stage in the reproductive process targeted by most methods of birth control is _______ and the latest targeted stage is _______.

Accepted Answer

A)  oogenesis; fertilization 
B)  fertilization; implantation 
C)  ovulation; implantation 
D)  oogenesis; implantation 
E)  ovulation; fertilization 
A)  oogenesis; fertilization 
B)  fertilization; implantation 
C)  ovulation; implantation 
D)  oogenesis; implantation 
E)  ovulation; fertilization

Question 17

Whereas luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are produced by the _______ and act on the _______, estrogen and progesterone are produced by _______ and act on the _______.

Accepted Answer

A)  hypothalamus; anterior pituitary; ovaries; uterus 
B)  ovaries; uterus; anterior pituitary; ovaries 
C)  uterus; ovaries; ovaries; anterior pituitary 
D)  anterior pituitary; ovaries; ovaries; uterus 
E)  hypothalamus; anterior pituitary; anterior pituitary; ovaries 
A)  hypothalamus; anterior pituitary; ovaries; uterus 
B)  ovaries; uterus; anterior pituitary; ovaries 
C)  uterus; ovaries; ovaries; anterior pituitary 
D)  anterior pituitary; ovaries; ovaries; uterus 
E)  hypothalamus; anterior pituitary; anterior pituitary; ovaries

Question 18

In the early 1900s, oyster fishermen cut sea stars (starfish), which are predators of oysters, into pieces and threw them back into the sea.This practice led to an explosion in the sea star population because

Accepted Answer

A)  other sea stars ate the pieces and were able to increase their reproductive output. 
B)  each arm with a portion of the central disc regenerated into a new individual. 
C)  competition was removed from the stronger sea stars that were not caught, allowing them to increase their reproductive output. 
D)  the oyster population grew in response to this new supply of food, allowing the population of their predators to increase as well. 
E)  each arm could form a new individual through budding. 
A)  other sea stars ate the pieces and were able to increase their reproductive output. 
B)  each arm with a portion of the central disc regenerated into a new individual. 
C)  competition was removed from the stronger sea stars that were not caught, allowing them to increase their reproductive output. 
D)  the oyster population grew in response to this new supply of food, allowing the population of their predators to increase as well. 
E)  each arm could form a new individual through budding.

Question 19

In human males and females, a tumor on the anterior pituitary would most immediately affect secretion of _______ and _______.

Accepted Answer

A)  follicle-stimulating hormone; estrogen 
B)  estrogen; progesterone 
C)  follicle-stimulating hormone; progesterone 
D)  luteinizing hormone; progesterone 
E)  luteinizing hormone; follicle-stimulating hormone 
A)  follicle-stimulating hormone; estrogen 
B)  estrogen; progesterone 
C)  follicle-stimulating hormone; progesterone 
D)  luteinizing hormone; progesterone 
E)  luteinizing hormone; follicle-stimulating hormone

Question 20

Some patients with breast cancer receive aromatase inhibitors as part of their medical treatment.Such an inhibitor causes

Accepted Answer

A)  enhanced growth and maturation of granulosa cells in the ovary. 
B)  enhanced secretion of inhibin. 
C)  low progesterone levels. 
D)  low estrogen levels. 
E)  maintenance of the corpus luteum. 
A)  enhanced growth and maturation of granulosa cells in the ovary. 
B)  enhanced secretion of inhibin. 
C)  low progesterone levels. 
D)  low estrogen levels. 
E)  maintenance of the corpus luteum.

Exam 42: Animal Reproduction

Parthenogenesis

In many species of birds, males lack a penis.Which statement about the reproductive process of these birds is true?

Which statement describes a characteristic of a 28-day human uterine cycle?

In the mammalian ovary, granulosa cells of the follicle are stimulated by follicle-stimulating hormone (FSH) to grow and mature.Granulosa cells are therefore similar to

A fertility specialist advises her male patient to switch from wearing tight briefs to loose-fitting boxers because _______ occurs optimally at temperatures lower than normal body temperature.

Which sequence represents the route by which sperm travel through the male reproductive tract?

Refer to the figure showing the human male reproductive system. Based on the figure, which statement is true?

In sea urchin fertilization, the fertilization cone

Refer to the figure showing the human male reproductive system. Based on the figure, which statement is true?

Most mammalian females (though not humans) have a period of sexual receptivity called _______.

Refer to the figure showing oogenesis. In the figure, the first haploid cell(s) is/are labeled _______.

The _______ cycles of most mammals, other than humans, do not include _______.

Which characteristic is typical of ovoviviparity?

You discover a mutation in sea urchins that causes females to produce eggs lacking bindin receptors on the vitelline envelope.What would you expect to see if you exposed these eggs to normal sea urchin sperm?

Pregnancy tests that can be done at home detect the presence of

For women, the earliest stage in the reproductive process targeted by most methods of birth control is _______ and the latest targeted stage is _______.

Whereas luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are produced by the _______ and act on the _______, estrogen and progesterone are produced by _______ and act on the _______.

In the early 1900s, oyster fishermen cut sea stars (starfish), which are predators of oysters, into pieces and threw them back into the sea.This practice led to an explosion in the sea star population because

In human males and females, a tumor on the anterior pituitary would most immediately affect secretion of _______ and _______.

Some patients with breast cancer receive aromatase inhibitors as part of their medical treatment.Such an inhibitor causes

Studying Life

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Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

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Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

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From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

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Plants Without Seeds: From Water to Land

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Filters

The _ cycles of most mammals, other than humans, do not include _.

For women, the earliest stage in the reproductive process targeted by most methods of birth control is _ and the latest targeted stage is _.

Whereas luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are produced by the ___ and act on the _, estrogen and progesterone are produced by _ and act on the ___.

In human males and females, a tumor on the anterior pituitary would most immediately affect secretion of _ and _.