Question 1

A male's "primary" sex characteristics include

Accepted Answer

A) deepening of the voice at puberty. 
B) embryonic differentiation of the seminal vesicles. 
C) growth of skeletal muscle. 
D) elongation of the skeleton prior to puberty. 
E) onset of growth of facial hair at puberty. 
A) deepening of the voice at puberty. 
B) embryonic differentiation of the seminal vesicles. 
C) growth of skeletal muscle. 
D) elongation of the skeleton prior to puberty. 
E) onset of growth of facial hair at puberty.

Question 2

In male mammals, excretory and reproductive systems share

Accepted Answer

A) the testes. 
B) the urethra. 
C) the urinary duct. 
D) the vas deferens. 
E) the prostate. 
A) the testes. 
B) the urethra. 
C) the urinary duct. 
D) the vas deferens. 
E) the prostate.

Question 3

Vasectomy

Accepted Answer

A) eliminates spermatogenesis. 
B) eliminates testosterone synthesis. 
C) prevents implantation of an embryo. 
D) prevents sperm from exiting the male urethra. 
E) prevents oocytes from entering the uterus. 
A) eliminates spermatogenesis. 
B) eliminates testosterone synthesis. 
C) prevents implantation of an embryo. 
D) prevents sperm from exiting the male urethra. 
E) prevents oocytes from entering the uterus.

Question 4

A function-disrupting mutation in the progesterone receptor gene would likely result in

Accepted Answer

A) the absence of secondary sex characteristics. 
B) the absence of pituitary gonadotropin hormones. 
C) the inability of the uterus to support pregnancy. 
D) enlarged and hyperactive uterine endometrium. 
E) the absence of mammary gland development. 
A) the absence of secondary sex characteristics. 
B) the absence of pituitary gonadotropin hormones. 
C) the inability of the uterus to support pregnancy. 
D) enlarged and hyperactive uterine endometrium. 
E) the absence of mammary gland development.

Question 5

A primary response by the Leydig cells in the testes to the presence of luteinizing hormone is an increase in the synthesis and secretion of

Accepted Answer

A) inhibin. 
B) testosterone. 
C) oxytocin. 
D) prolactin. 
E) progesterone. 
A) inhibin. 
B) testosterone. 
C) oxytocin. 
D) prolactin. 
E) progesterone.

Question 6

The surgical removal of the seminal vesicles would likely

Accepted Answer

A) cause sterility because sperm would not be produced. 
B) cause sterility because sperm would not be able to exit the body. 
C) greatly reduce the volume of semen. 
D) enhance the fertilization potency of sperm in the uterus. 
E) cause the testes to migrate back into the abdominal cavity. 
A) cause sterility because sperm would not be produced. 
B) cause sterility because sperm would not be able to exit the body. 
C) greatly reduce the volume of semen. 
D) enhance the fertilization potency of sperm in the uterus. 
E) cause the testes to migrate back into the abdominal cavity.

Question 7

In humans, the follicular cells that remain behind in the ovary following ovulation become

Accepted Answer

A) ovarian endometrium shed at the time of menses. 
B) a steroid-hormone synthesizing structure called the corpus luteum. 
C) the thickened portion of the uterine wall. 
D) swept into the fallopian tube. 
E) the placenta, which secretes cervical mucus. 
A) ovarian endometrium shed at the time of menses. 
B) a steroid-hormone synthesizing structure called the corpus luteum. 
C) the thickened portion of the uterine wall. 
D) swept into the fallopian tube. 
E) the placenta, which secretes cervical mucus.

Question 8

Which statement is False concerning reproduction in invertebrate animals?

Accepted Answer

A) Separate sexes are not observed among any invertebrates. 
B) Some have both sexes within one individual organism. 
C) Some utilize external fertilization. 
D) Some utilize internal fertilization. 
E) None of the invertebrates have structures that store sperm. 
A) Separate sexes are not observed among any invertebrates. 
B) Some have both sexes within one individual organism. 
C) Some utilize external fertilization. 
D) Some utilize internal fertilization. 
E) None of the invertebrates have structures that store sperm.

Question 9

Which of the following characterizes parthenogenesis?

Accepted Answer

A) An individual may change its sex during its lifetime. 
B) Specialized groups of cells grow into new individuals. 
C) An organism is first a male and then a female. 
D) An egg develops without being fertilized. 
E) Both mates have male and female reproductive organs. 
A) An individual may change its sex during its lifetime. 
B) Specialized groups of cells grow into new individuals. 
C) An organism is first a male and then a female. 
D) An egg develops without being fertilized. 
E) Both mates have male and female reproductive organs.

Question 10

The use of birth-control pills (oral contraceptives)

Accepted Answer

A) reduces the incidence of ovulation. 
B) prevents fertilization by keeping sperm and egg physically separated by a mechanical barrier. 
C) prevents implantation of an embryo. 
D) prevents sperm from exiting the male urethra. 
E) prevents oocytes from entering the uterus. 
A) reduces the incidence of ovulation. 
B) prevents fertilization by keeping sperm and egg physically separated by a mechanical barrier. 
C) prevents implantation of an embryo. 
D) prevents sperm from exiting the male urethra. 
E) prevents oocytes from entering the uterus.

Question 11

In correct chronological order, the three phases of the ovarian cycle are

Accepted Answer

A) menstrual → ovulation → luteal 
B) follicular → luteal → secretory 
C) menstrual → proliferative → secretory 
D) follicular → ovulation → luteal 
E) proliferative → luteal → ovulation 
A) menstrual → ovulation → luteal 
B) follicular → luteal → secretory 
C) menstrual → proliferative → secretory 
D) follicular → ovulation → luteal 
E) proliferative → luteal → ovulation

Question 12

For the 10 days following ovulation in a nonpregnant menstrual cycle, the main source of progesterone is the

Accepted Answer

A) adrenal cortex. 
B) anterior pituitary. 
C) corpus luteum. 
D) developing follicle. 
E) placenta. 
A) adrenal cortex. 
B) anterior pituitary. 
C) corpus luteum. 
D) developing follicle. 
E) placenta.

Question 13

Internal and external fertilization both

Accepted Answer

A) produce zygotes. 
B) occur only among invertebrates. 
C) occur only among terrestrial animals. 
D) depend on the use of intromittent copulatory organs. 
E) occur only among birds. 
A) produce zygotes. 
B) occur only among invertebrates. 
C) occur only among terrestrial animals. 
D) depend on the use of intromittent copulatory organs. 
E) occur only among birds.

Question 14

Females of many insect species, including honeybee queens, can store gametes shed by their mating partners in

Accepted Answer

A) their nests. 
B) the abdominal tract. 
C) the cloaca. 
D) the uterus. 
E) the spermatheca. 
A) their nests. 
B) the abdominal tract. 
C) the cloaca. 
D) the uterus. 
E) the spermatheca.

Question 15

Which of the following is not properly paired?

Accepted Answer

A) seminiferous tubule-cervix 
B) Sertoli cells-follicle cells 
C) testosterone-estradiol 
D) labia majora-scrotum 
E) vas deferens-oviduct 
A) seminiferous tubule-cervix 
B) Sertoli cells-follicle cells 
C) testosterone-estradiol 
D) labia majora-scrotum 
E) vas deferens-oviduct

Question 16

If you observe vertebrate organisms with parthenogenetic reproduction, internal development of embryos, and the lack of parental care for its young, you should categorize these organisms as

Accepted Answer

A) earthworms. 
B) lizards. 
C) birds. 
D) frogs. 
E) mammals. 
A) earthworms. 
B) lizards. 
C) birds. 
D) frogs. 
E) mammals.

Question 17

Testosterone is synthesized primarily by the

Accepted Answer

A) sperm cells. 
B) hypothalamus. 
C) Leydig cells. 
D) anterior pituitary gland. 
E) seminiferous tubules. 
A) sperm cells. 
B) hypothalamus. 
C) Leydig cells. 
D) anterior pituitary gland. 
E) seminiferous tubules.

Question 18

Among these contraception methods, which has the highest risk of accidental pregnancy?

Accepted Answer

A) diaphragm 
B) condom 
C) coitus interruptus 
D) vasectomy 
E) rhythm method 
A) diaphragm 
B) condom 
C) coitus interruptus 
D) vasectomy 
E) rhythm method

Question 19

For normal human fertilization to occur,

Accepted Answer

A) many ova must be released. 
B) the uterus must be enlarged. 
C) only one sperm need penetrate one egg. 
D) secretion of pituitary FSH and LH must decrease. 
E) the secondary oocyte must implant in the uterus. 
A) many ova must be released. 
B) the uterus must be enlarged. 
C) only one sperm need penetrate one egg. 
D) secretion of pituitary FSH and LH must decrease. 
E) the secondary oocyte must implant in the uterus.

Question 20

Tubal ligation

Accepted Answer

A) reduces the incidence of ovulation. 
B) prevents fertilization by preventing sperm from entering the uterus. 
C) prevents implantation of an embryo. 
D) prevents sperm from exiting the male urethra. 
E) prevents oocytes from entering the uterus. 
A) reduces the incidence of ovulation. 
B) prevents fertilization by preventing sperm from entering the uterus. 
C) prevents implantation of an embryo. 
D) prevents sperm from exiting the male urethra. 
E) prevents oocytes from entering the uterus.

Exam 46: Animal Reproduction

A male's "primary" sex characteristics include

In male mammals, excretory and reproductive systems share

Vasectomy

A function-disrupting mutation in the progesterone receptor gene would likely result in

A primary response by the Leydig cells in the testes to the presence of luteinizing hormone is an increase in the synthesis and secretion of

The surgical removal of the seminal vesicles would likely

In humans, the follicular cells that remain behind in the ovary following ovulation become

Which statement is False concerning reproduction in invertebrate animals?

Which of the following characterizes parthenogenesis?

The use of birth-control pills (oral contraceptives)

In correct chronological order, the three phases of the ovarian cycle are

For the 10 days following ovulation in a nonpregnant menstrual cycle, the main source of progesterone is the

Internal and external fertilization both

Females of many insect species, including honeybee queens, can store gametes shed by their mating partners in

Which of the following is not properly paired?

If you observe vertebrate organisms with parthenogenetic reproduction, internal development of embryos, and the lack of parental care for its young, you should categorize these organisms as

Testosterone is synthesized primarily by the

Among these contraception methods, which has the highest risk of accidental pregnancy?

For normal human fertilization to occur,

Tubal ligation

Introduction: Themes in the Study of Life

The Chemical Context of Life

Water and the Fitness of the Environment

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Control of Gene Expression

Viruses

Biotechnology

Genomes and Their Evolution

Descent With Modification: a Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity Ii: the Evolution of Seed Plants

Fungi

An Introduction to Animal Diversity

Invertebrates

Vertebrates

Plant Structure, Growth, and Development

Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems

Conservation Biology and Restoration Ecology

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