Question 1

Asexual reproduction

Accepted Answer

A)  occurs in plants but not in animals. 
B)  creates genetically diverse individuals. 
C)  is an unsuccessful mode of reproduction. 
D)  occurs in some animals when they split themselves in two. 
E)  has advantages over sexual reproduction when the environment is changing. 
A)  occurs in plants but not in animals. 
B)  creates genetically diverse individuals. 
C)  is an unsuccessful mode of reproduction. 
D)  occurs in some animals when they split themselves in two. 
E)  has advantages over sexual reproduction when the environment is changing.

Question 2

You are keeping a planarian flatworm in a dish and notice that after a period of time the animal has pulled itself in two and each half has regenerated the lost half.From this you can surmise that the two animals

Accepted Answer

A)  are genetically identical. 
B)  share the same mitochondrial DNA but not the same nuclear DNA. 
C)  are the result of sexual reproduction. 
D)  are haploid. 
E)  are unable to reproduce sexually. 
A)  are genetically identical. 
B)  share the same mitochondrial DNA but not the same nuclear DNA. 
C)  are the result of sexual reproduction. 
D)  are haploid. 
E)  are unable to reproduce sexually.

Question 3

If you catch a mallard duck,what specific features could you use to determine if the duck you caught is male?

Accepted Answer

A)  Bright coloration 
B)  Bright coloration and an external penis 
C)  Dull coloration 
D)  Dull coloration and an external penis 
E)  Penis and scrotal sac 
A)  Bright coloration 
B)  Bright coloration and an external penis 
C)  Dull coloration 
D)  Dull coloration and an external penis 
E)  Penis and scrotal sac

Question 4

You find a leathery egg casing attached to the substrate in the ocean.You do not know what organism laid the egg,but you find an animal embryo developing inside.From what you have observed,you can conclude that the embryo will develop into an organism that

Accepted Answer

A)  uses external fertilization. 
B)  spawns gametes. 
C)  uses internal fertilization. 
D)  is a terrestrial animal. 
E)  receives parental care until hatching. 
A)  uses external fertilization. 
B)  spawns gametes. 
C)  uses internal fertilization. 
D)  is a terrestrial animal. 
E)  receives parental care until hatching.

Question 5

A woman is wondering if she might be pregnant.She knows that the most reliable pregnancy test (done in a doctor's office)can detect a pregnancy about 4 days after the embryo arrives in the uterus.The earliest time at which she could expect an accurate result from this test would be _______ after the day of possible fertilization.

Accepted Answer

A)  4 days 
B)  6 days 
C)  8 days 
D)  2 weeks 
E)  3 weeks 
A)  4 days 
B)  6 days 
C)  8 days 
D)  2 weeks 
E)  3 weeks

Question 6

When you meet a person on the street and quickly assess that person's sex,you are most likely basing your assessment on

Accepted Answer

A)  primary sex organs. 
B)  secondary sex organs. 
C)  secondary sexual characteristics. 
D)  hormones. 
E)  pheromones. 
A)  primary sex organs. 
B)  secondary sex organs. 
C)  secondary sexual characteristics. 
D)  hormones. 
E)  pheromones.

Question 7

What is the principal difference between menstrual and estrous cycles?

Accepted Answer

A)  The estrous cycle occurs if the female becomes pregnant,whereas the menstrual cycle occurs if the female is not pregnant. 
B)  The menstrual cycle occurs if the female becomes pregnant,whereas the estrous cycle occurs if the female is not pregnant. 
C)  The estrous cycle lacks menstruation. 
D)  The menstrual cycle occurs in mammals,whereas the estrous cycle occurs in birds. 
E)  Only the menstrual cycle is controlled by estrogen. 
A)  The estrous cycle occurs if the female becomes pregnant,whereas the menstrual cycle occurs if the female is not pregnant. 
B)  The menstrual cycle occurs if the female becomes pregnant,whereas the estrous cycle occurs if the female is not pregnant. 
C)  The estrous cycle lacks menstruation. 
D)  The menstrual cycle occurs in mammals,whereas the estrous cycle occurs in birds. 
E)  Only the menstrual cycle is controlled by estrogen.

Question 8

In mammals,the egg is propelled through the oviduct by means of

Accepted Answer

A)  cilia on its surface. 
B)  its flagellum. 
C)  uterine contractions. 
D)  cilia lining the oviduct. 
E)  amoeboid motion. 
A)  cilia on its surface. 
B)  its flagellum. 
C)  uterine contractions. 
D)  cilia lining the oviduct. 
E)  amoeboid motion.

Question 9

In the mammalian testis,male sex hormones are produced by the

Accepted Answer

A)  Leydig cells. 
B)  epididymis. 
C)  scrotum. 
D)  seminiferous tubules. 
E)  vas deferens. 
A)  Leydig cells. 
B)  epididymis. 
C)  scrotum. 
D)  seminiferous tubules. 
E)  vas deferens.

Question 10

Progesterone and estrogen are hormones produced by the

Accepted Answer

A)  anterior pituitary. 
B)  posterior pituitary. 
C)  Sertoli cells. 
D)  hypothalamus. 
E)  corpus luteum. 
A)  anterior pituitary. 
B)  posterior pituitary. 
C)  Sertoli cells. 
D)  hypothalamus. 
E)  corpus luteum.

Question 11

A penis is found in

Accepted Answer

A)  all male animals. 
B)  all organisms except for hermaphrodites. 
C)  mostly species with external fertilization. 
D)  mostly species with internal fertilization. 
E)  mostly species that spawn their gametes. 
A)  all male animals. 
B)  all organisms except for hermaphrodites. 
C)  mostly species with external fertilization. 
D)  mostly species with internal fertilization. 
E)  mostly species that spawn their gametes.

Question 12

Generally,among vertebrates

Accepted Answer

A)  cells are haploid during embryonic development and become diploid at birth. 
B)  cells are diploid during embryonic development and become haploid at birth. 
C)  cells are diploid during adult life and are haploid as a blastocyst. 
D)  gametic cells are haploid and somatic cells are diploid. 
E)  gametic cells are diploid and somatic cells are haploid. 
A)  cells are haploid during embryonic development and become diploid at birth. 
B)  cells are diploid during embryonic development and become haploid at birth. 
C)  cells are diploid during adult life and are haploid as a blastocyst. 
D)  gametic cells are haploid and somatic cells are diploid. 
E)  gametic cells are diploid and somatic cells are haploid.

Question 13

One male germ cell produces _______ gamete(s);one female germ cell produces _______ gamete(s).

Accepted Answer

A)  one;one 
B)  one;two 
C)  one;four 
D)  two;one 
E)  four;one 
A)  one;one 
B)  one;two 
C)  one;four 
D)  two;one 
E)  four;one

Question 14

The red fox (Vulpes vulpes)enters estrus for a single 1- to 6-day period each year and ovulates once.This implies that

Accepted Answer

A)  foxes have delayed implantation. 
B)  the female has no more than one litter of kits each year. 
C)  foxes are monogamous,having only one sexual partner. 
D)  foxes are semelparous. 
E)  a female will mate again if the embryos abort prior to birth. 
A)  foxes have delayed implantation. 
B)  the female has no more than one litter of kits each year. 
C)  foxes are monogamous,having only one sexual partner. 
D)  foxes are semelparous. 
E)  a female will mate again if the embryos abort prior to birth.

Question 15

What is the correct sequence of structures through which a mammalian sperm passes before fertilizing an egg?

Accepted Answer

A)  Uterus,vagina,cervix,oviduct,ovary 
B)  Vagina,cervix,uterus,oviduct 
C)  Oviduct,uterus,vagina,ovary,body cavity 
D)  Vagina,cervix,oviduct,uterus 
E)  Vagina,uterus,oviduct,body cavity 
A)  Uterus,vagina,cervix,oviduct,ovary 
B)  Vagina,cervix,uterus,oviduct 
C)  Oviduct,uterus,vagina,ovary,body cavity 
D)  Vagina,cervix,oviduct,uterus 
E)  Vagina,uterus,oviduct,body cavity

Question 16

A prevailing view concerning human oocytes is that

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 17

The female _______ provides nutrients to developing embryos within its reproductive tract.

Accepted Answer

A)  purple sea urchin 
B)  hammerhead shark 
C)  Pacific salmon 
D)  anemonefish 
E)  coral 
A)  purple sea urchin 
B)  hammerhead shark 
C)  Pacific salmon 
D)  anemonefish 
E)  coral

Question 18

The immediate trigger for ovulation and formation of the corpus luteum in a human is

Accepted Answer

A)  a peak in estrogen. 
B)  a peak in luteinizing hormone. 
C)  a peak in progesterone. 
D)  the presence of sperm in the reproductive tract. 
E)  the readiness of the endometrial lining in the uterus. 
A)  a peak in estrogen. 
B)  a peak in luteinizing hormone. 
C)  a peak in progesterone. 
D)  the presence of sperm in the reproductive tract. 
E)  the readiness of the endometrial lining in the uterus.

Question 19

Female silkworm moths lay fertilized eggs in the autumn.These eggs hatch in the spring

Accepted Answer

A)  if they have experienced at least two months of cold temperatures (5°C or less). 
B)  after steady but slow development over the winter months. 
C)  as long as the winter is mild. 
D)  as long as they have been incubated in a warm cocoon during the intervening months. 
E)  on the first day after a full moon when temperatures have reached 30°C. 
A)  if they have experienced at least two months of cold temperatures (5°C or less). 
B)  after steady but slow development over the winter months. 
C)  as long as the winter is mild. 
D)  as long as they have been incubated in a warm cocoon during the intervening months. 
E)  on the first day after a full moon when temperatures have reached 30°C.

Question 20

Sexual reproduction has an advantage over asexual reproduction in that sexual reproduction

Accepted Answer

A)  is more energetically efficient. 
B)  maintains more favorable combinations of genes. 
C)  reduces competition. 
D)  produces more organisms that can survive in a stable environment. 
E)  creates genetic diversity that can be favorable. 
A)  is more energetically efficient. 
B)  maintains more favorable combinations of genes. 
C)  reduces competition. 
D)  produces more organisms that can survive in a stable environment. 
E)  creates genetic diversity that can be favorable.

Exam 37: Animal Reproduction

Asexual reproduction

You are keeping a planarian flatworm in a dish and notice that after a period of time the animal has pulled itself in two and each half has regenerated the lost half.From this you can surmise that the two animals

If you catch a mallard duck,what specific features could you use to determine if the duck you caught is male?

You find a leathery egg casing attached to the substrate in the ocean.You do not know what organism laid the egg,but you find an animal embryo developing inside.From what you have observed,you can conclude that the embryo will develop into an organism that

When you meet a person on the street and quickly assess that person's sex,you are most likely basing your assessment on

What is the principal difference between menstrual and estrous cycles?

In mammals,the egg is propelled through the oviduct by means of

In the mammalian testis,male sex hormones are produced by the

Progesterone and estrogen are hormones produced by the

A penis is found in

Generally,among vertebrates

One male germ cell produces _______ gamete(s);one female germ cell produces _______ gamete(s).

The red fox (Vulpes vulpes)enters estrus for a single 1- to 6-day period each year and ovulates once.This implies that

What is the correct sequence of structures through which a mammalian sperm passes before fertilizing an egg?

A prevailing view concerning human oocytes is that

The female _______ provides nutrients to developing embryos within its reproductive tract.

The immediate trigger for ovulation and formation of the corpus luteum in a human is

Female silkworm moths lay fertilized eggs in the autumn.These eggs hatch in the spring

Sexual reproduction has an advantage over asexual reproduction in that sexual reproduction

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cells: the Working Units of Life

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

One male germ cell produces _ gamete(s);one female germ cell produces _ gamete(s).