Question 1

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

Accepted Answer

A)  Inhibin exerts negative feedback on the structure at point 1. 
B)  Circulating testosterone inhibits the release of FSH from the structure at point 2. 
C)  Examples of structures at point 5 are genitals, larynx, and skeletal muscles. 
D)  The cells at point 3 are located inside seminiferous tubules. 
E)  Low levels of circulating testosterone inhibit the structure at point 2. 
A)  Inhibin exerts negative feedback on the structure at point 1. 
B)  Circulating testosterone inhibits the release of FSH from the structure at point 2. 
C)  Examples of structures at point 5 are genitals, larynx, and skeletal muscles. 
D)  The cells at point 3 are located inside seminiferous tubules. 
E)  Low levels of circulating testosterone inhibit the structure at point 2.

Question 2

An earthworm moves relatively slowly through the soil; thus, it is relatively uncommon to encounter potential mates.But when two sexually mature earthworms do happen to encounter each other, they are able to mate without first determining the sex of the other individual.This is because these organisms are _______, which means each individual has both male and female sexual organs.

Accepted Answer

The answer of An earthworm moves relatively slowly through the...

Question 3

If a man produces an insufficient amount of gonadotropin-releasing hormone (GnRH), what fertility issues will he likely face, and why?

Accepted Answer

The man is likely to be infertile becaus

Question 4

Which feature is usually associated with asexual reproduction?

Accepted Answer

A)  Identical genetic makeup of parent and progeny 
B)  Fertilization 
C)  Spawning 
D)  Genetic diversity among the offspring 
E)  An inability to reproduce sexually 
A)  Identical genetic makeup of parent and progeny 
B)  Fertilization 
C)  Spawning 
D)  Genetic diversity among the offspring 
E)  An inability to reproduce sexually

Question 5

During _______, the germ cell divisions are dramatically unequal, assuring that the developing embryo will start out with as much cytoplasm, informational molecules, and nutrients as possible.

Accepted Answer

The answer of During _______, the germ cell divisions are...

Question 6

In which procedure does fertilization occur within the female reproductive tract?

Accepted Answer

A)  Artificial insemination 
B)  In vitro fertilization (IVF) 
C)  Intracytoplasmic sperm injection 
D)  Intrafallopian zygote transfer 
E)  Tubal embryo transfer 
A)  Artificial insemination 
B)  In vitro fertilization (IVF) 
C)  Intracytoplasmic sperm injection 
D)  Intrafallopian zygote transfer 
E)  Tubal embryo transfer

Question 7

Which event occurs midway through the human ovarian cycle, around day 14?

Accepted Answer

A)  An oocyte is ovulated 
B)  Secretion of progesterone peaks 
C)  Corpus luteum degenerates 
D)  A number of primary oocytes begin to mature 
E)  The oogonium in the primary follicle becomes a primary oocyte 
A)  An oocyte is ovulated 
B)  Secretion of progesterone peaks 
C)  Corpus luteum degenerates 
D)  A number of primary oocytes begin to mature 
E)  The oogonium in the primary follicle becomes a primary oocyte

Question 8

Which statement characterizes the combination birth control pill?

Accepted Answer

A)  Hormones in the pill block progesterone. 
B)  It contains synthetic FSH and LH. 
C)  It suspends the uterine cycle. 
D)  It is a hormone-containing pill taken within 72 hours of unprotected sex. 
E)  It suspends the ovarian cycle. 
A)  Hormones in the pill block progesterone. 
B)  It contains synthetic FSH and LH. 
C)  It suspends the uterine cycle. 
D)  It is a hormone-containing pill taken within 72 hours of unprotected sex. 
E)  It suspends the ovarian cycle.

Question 9

Which statement about human reproduction is true?

Accepted Answer

A)  Fertilization stimulates completion of the first meiotic division of the human female gamete. 
B)  Hormones produced by the placenta sustain pregnancy. 
C)  Implantation is the process by which the blastocyst becomes embedded in the endometrium of the vagina. 
D)  FSH prepares the endometrium for arrival of the blastocyst. 
E)  Ovaries release eggs directly into the oviducts. 
A)  Fertilization stimulates completion of the first meiotic division of the human female gamete. 
B)  Hormones produced by the placenta sustain pregnancy. 
C)  Implantation is the process by which the blastocyst becomes embedded in the endometrium of the vagina. 
D)  FSH prepares the endometrium for arrival of the blastocyst. 
E)  Ovaries release eggs directly into the oviducts.

Question 10

A woman wishing to prevent pregnancy and to avoid sexually transmitted diseases should choose which method of birth control?

Accepted Answer

A)  Diaphragm 
B)  Cervical cap 
C)  Condom 
D)  IUD 
E)  Birth control pill 
A)  Diaphragm 
B)  Cervical cap 
C)  Condom 
D)  IUD 
E)  Birth control pill

Question 11

How do spermatogenesis and oogenesis in mammals differ?

Accepted Answer

Two main differences between spermatogen

Question 12

In the mammalian ovary, thecal cells of the follicle are stimulated by luteinizing hormone (LH) to produce testosterone.Thecal cells are therefore similar to

Accepted Answer

A)  granulosa cells of the follicle. 
B)  Leydig cells in the testes of males. 
C)  Sertoli cells in the testes of males. 
D)  primary oocytes. 
E)  cells of the corpus luteum. 
A)  granulosa cells of the follicle. 
B)  Leydig cells in the testes of males. 
C)  Sertoli cells in the testes of males. 
D)  primary oocytes. 
E)  cells of the corpus luteum.

Question 13

The cytoplasmic bridges between _______ of mammals are necessary to allow sharing of gene products from _______ chromosomes.

Accepted Answer

A)  primary spermatocytes; X 
B)  mature sperm cells; Y 
C)  spermatogonia; Y 
D)  secondary spermatocytes and between spermatids; X 
E)  progeny of germ cells; Y 
A)  primary spermatocytes; X 
B)  mature sperm cells; Y 
C)  spermatogonia; Y 
D)  secondary spermatocytes and between spermatids; X 
E)  progeny of germ cells; Y

Question 14

Refer to the figure depicting the average blood concentrations of four 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 figure, which statement is true?

Accepted Answer

A)  Curve A represents luteinizing hormone (LH) levels. 
B)  Curve B represents progesterone levels. 
C)  Curve C represents a hormone secreted from the anterior pituitary gland. 
D)  Curve D represents a hormone produced by the corpus luteum. 
E)  Curve A represents a hormone secreted by the ovary. 
A)  Curve A represents luteinizing hormone (LH) levels. 
B)  Curve B represents progesterone levels. 
C)  Curve C represents a hormone secreted from the anterior pituitary gland. 
D)  Curve D represents a hormone produced by the corpus luteum. 
E)  Curve A represents a hormone secreted by the ovary.

Question 15

Which feature characterizes both spermatogenesis and oogenesis in humans?

Accepted Answer

A)  A period of developmental arrest in prophase I of meiosis 
B)  Reproductive stem cells that arrive in the gonad during development and proliferate by mitosis 
C)  The production of four haploid gametes 
D)  The completion of a second meiotic division at fertilization 
E)  A period of developmental arrest after the first meiotic division 
A)  A period of developmental arrest in prophase I of meiosis 
B)  Reproductive stem cells that arrive in the gonad during development and proliferate by mitosis 
C)  The production of four haploid gametes 
D)  The completion of a second meiotic division at fertilization 
E)  A period of developmental arrest after the first meiotic division

Question 16

Which statement about the female reproductive system is true?

Accepted Answer

A)  The placenta is formed from both the endometrium and the embryo. 
B)  The placenta produces oxytocin. 
C)  The ovarian cycle continues during pregnancy, but the uterine cycle ceases. 
D)  The uterus undergoes contractions only during true labor. 
E)  Progesterone stimulates contractions of uterine muscle. 
A)  The placenta is formed from both the endometrium and the embryo. 
B)  The placenta produces oxytocin. 
C)  The ovarian cycle continues during pregnancy, but the uterine cycle ceases. 
D)  The uterus undergoes contractions only during true labor. 
E)  Progesterone stimulates contractions of uterine muscle.

Question 17

Refer to the figure showing four different species.   Which organisms in the figure lay amniote eggs?

Accepted Answer

A)  A only 
B)  B only 
C)  Both A and B 
D)  Both B and C 
E)  Both C and D 
A)  A only 
B)  B only 
C)  Both A and B 
D)  Both B and C 
E)  Both C and D

Question 18

The synthetic hormones in birth control pills suspend the ovarian cycle, which operates by means of feedback to the hypothalamus and the _______.

Accepted Answer

The answer of The synthetic hormones in birth control pills...

Question 19

Which feature is characteristic of animals with amniote eggs?

Accepted Answer

A)  Production of an egg surrounded by a protective layer of jelly 
B)  External fertilization 
C)  Spawning 
D)  Primary sex organs in the absence of accessory sex organs 
E)  Reproduction in terrestrial environments 
A)  Production of an egg surrounded by a protective layer of jelly 
B)  External fertilization 
C)  Spawning 
D)  Primary sex organs in the absence of accessory sex organs 
E)  Reproduction in terrestrial environments

Question 20

A drug called RU-486 blocks the actions of progesterone.It is called a contragestational drug because it can terminate a pregnancy after fertilization has occurred.How does RU-486 do this?

Accepted Answer

Progesterone is required to maintain the

Exam 42: Animal Reproduction

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

If a man produces an insufficient amount of gonadotropin-releasing hormone (GnRH), what fertility issues will he likely face, and why?

Which feature is usually associated with asexual reproduction?

During _______, the germ cell divisions are dramatically unequal, assuring that the developing embryo will start out with as much cytoplasm, informational molecules, and nutrients as possible.

In which procedure does fertilization occur within the female reproductive tract?

Which event occurs midway through the human ovarian cycle, around day 14?

Which statement characterizes the combination birth control pill?

Which statement about human reproduction is true?

A woman wishing to prevent pregnancy and to avoid sexually transmitted diseases should choose which method of birth control?

How do spermatogenesis and oogenesis in mammals differ?

In the mammalian ovary, thecal cells of the follicle are stimulated by luteinizing hormone (LH) to produce testosterone.Thecal cells are therefore similar to

The cytoplasmic bridges between _______ of mammals are necessary to allow sharing of gene products from _______ chromosomes.

Refer to the figure depicting the average blood concentrations of four 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 figure, which statement is true?

Which feature characterizes both spermatogenesis and oogenesis in humans?

Which statement about the female reproductive system is true?

Refer to the figure showing four different species. Which organisms in the figure lay amniote eggs?

The synthetic hormones in birth control pills suspend the ovarian cycle, which operates by means of feedback to the hypothalamus and the _______.

Which feature is characteristic of animals with amniote eggs?

A drug called RU-486 blocks the actions of progesterone.It is called a contragestational drug because it can terminate a pregnancy after fertilization has occurred.How does RU-486 do this?

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

Filters

The cytoplasmic bridges between _ of mammals are necessary to allow sharing of gene products from _ chromosomes.