Question 1

Which one of the following is the earliest event in the process of fertilization?

Accepted Answer

A) Sperm contact the jelly coat around the egg. 
B) The sperm head plasma membrane fuses with the egg plasma membrane. 
C) Enzymes from the acrosome are released. 
D) The sperm nucleus enters the cytoplasm of the egg. 
A) Sperm contact the jelly coat around the egg. 
B) The sperm head plasma membrane fuses with the egg plasma membrane. 
C) Enzymes from the acrosome are released. 
D) The sperm nucleus enters the cytoplasm of the egg.

Question 2

The puffy circular structure represents the transformation of a structure previously called the ________.

Accepted Answer

A) corpus luteum 
B) follicle 
C) primary oocyte 
D) ovum 
A) corpus luteum 
B) follicle 
C) primary oocyte 
D) ovum

Question 3

Which statement about a birth control method is TRUE?

Accepted Answer

A) Natural family planning is one of the most reliable forms of birth control. 
B) Morning-after pills are about 25% effective at preventing pregnancy. 
C) Tubal ligation prevents ovulation. 
D) A vasectomy involves removing a section of each vas deferens. 
A) Natural family planning is one of the most reliable forms of birth control. 
B) Morning-after pills are about 25% effective at preventing pregnancy. 
C) Tubal ligation prevents ovulation. 
D) A vasectomy involves removing a section of each vas deferens.

Question 4

The figure shows oogenesis. What is the function of the polar bodies that are produced during oogenesis? They are a mechanism that allows for ________.

Accepted Answer

A) the shedding of excess cytoplasm during the production of a haploid ovum 
B) the shedding of excess genetic material during the production of a haploid ovum 
C) the shedding of excess mitochondria during the production of a haploid ovum 
D) streamlining of the ovum so as to facilitate the penetration of an ovum by a sperm 
A) the shedding of excess cytoplasm during the production of a haploid ovum 
B) the shedding of excess genetic material during the production of a haploid ovum 
C) the shedding of excess mitochondria during the production of a haploid ovum 
D) streamlining of the ovum so as to facilitate the penetration of an ovum by a sperm

Question 5

The three stages of labor, in the proper order are ________.

Accepted Answer

A) dilation, expulsion, delivery of the placenta 
B) dilation, crowning, expulsion 
C) contractions, dilation, expulsion 
D) contractions, dilation, crowning 
A) dilation, expulsion, delivery of the placenta 
B) dilation, crowning, expulsion 
C) contractions, dilation, expulsion 
D) contractions, dilation, crowning

Question 6

All of these are similarities between the male and female system EXCEPT one. Choose the exception.

Accepted Answer

A) Both have erectile tissue that becomes engorged with blood during sexual excitement. 
B) Both have paired gamete-producing organs. 
C) Both have a urethra that carries both urine and gametes. 
D) Both have a pair of tubes that can carry gametes. 
A) Both have erectile tissue that becomes engorged with blood during sexual excitement. 
B) Both have paired gamete-producing organs. 
C) Both have a urethra that carries both urine and gametes. 
D) Both have a pair of tubes that can carry gametes.

Question 7

What process dominates the third trimester of human development?

Accepted Answer

A) formation of internal organs 
B) formation of external features such as arms and legs 
C) growth 
D) organ formation 
A) formation of internal organs 
B) formation of external features such as arms and legs 
C) growth 
D) organ formation

Question 8

When does the human embryo implant in the wall of the uterus?

Accepted Answer

A) within a few hours of fertilization 
B) about a day after conception 
C) about a week after conception 
D) just after gastrulation 
A) within a few hours of fertilization 
B) about a day after conception 
C) about a week after conception 
D) just after gastrulation

Question 9

Embryo implantation normally occurs in the ________.

Accepted Answer

A) oviduct 
B) corpus luteum 
C) follicle of the ovary 
D) endometrium of the uterus 
A) oviduct 
B) corpus luteum 
C) follicle of the ovary 
D) endometrium of the uterus

Question 10

According to the diagram, after a vasectomy (within the scrotal sac), ________.

Accepted Answer

A) secretions from the prostate can no longer reach the urethra 
B) secretions from the seminal vesicles can no longer reach the urethra 
C) secretions from the sperm duct can no longer reach the urethra 
D) sperm from the epididymis can no longer reach the urethra 
A) secretions from the prostate can no longer reach the urethra 
B) secretions from the seminal vesicles can no longer reach the urethra 
C) secretions from the sperm duct can no longer reach the urethra 
D) sperm from the epididymis can no longer reach the urethra

Question 11

Which of these events occurs first?

Accepted Answer

A) gastrulation 
B) cleavage 
C) implantation 
D) formation of the placenta 
A) gastrulation 
B) cleavage 
C) implantation 
D) formation of the placenta

Question 12

Which STD is NOT caused by a virus?

Accepted Answer

A) AIDS 
B) chlamydia 
C) genital warts 
D) genital herpes 
A) AIDS 
B) chlamydia 
C) genital warts 
D) genital herpes

Question 13

Which reproduction method is associated with sexual reproduction?

Accepted Answer

A) fission 
B) fragmentation 
C) gamete production 
A) fission 
B) fragmentation 
C) gamete production

Question 14

Cleavage results in ________.

Accepted Answer

A) formation of the nervous system 
B) formation of the notochord 
C) formation of more cells 
D) segmentation 
A) formation of the nervous system 
B) formation of the notochord 
C) formation of more cells 
D) segmentation

Question 15

Which outcome is a result of programmed cell death?

Accepted Answer

A) formation of fingers in humans 
B) gastrulation 
C) formation of the notochord 
D) formation of the brain 
A) formation of fingers in humans 
B) gastrulation 
C) formation of the notochord 
D) formation of the brain

Question 16

Mesoderm gives rise to the ________.

Accepted Answer

A) heart and kidneys 
B) brain and skin 
C) nervous system and thyroid 
D) liver and pancreas 
A) heart and kidneys 
B) brain and skin 
C) nervous system and thyroid 
D) liver and pancreas

Question 17

What advantage is associated with human testes located in an external sac rather than in the abdominal cavity?

Accepted Answer

A) semen can travel a shorter distance during ejaculation 
B) testes can be kept at a constant temperature 
C) testes can be kept cooler than the body's interior 
D) testes can enlarge at sexual maturity 
A) semen can travel a shorter distance during ejaculation 
B) testes can be kept at a constant temperature 
C) testes can be kept cooler than the body's interior 
D) testes can enlarge at sexual maturity

Question 18

Scenario
Birth control methods act at many points in the reproductive cycle. Some options, such as birth control pills, are highly effective at preventing pregnancy. However, only a few commonly available methods are effective at preventing the transmission of sexually transmitted disease (STD). The Center for Disease Control estimates that each year about 10 million new STD infections strike people ages 15 to 24.
-A diaphragm functions as a birth control device by ________.

Accepted Answer

A) preventing ovulation 
B) preventing implantation of an embryo 
C) stimulating the production of sperm-killing antibodies 
D) preventing the movement of sperm into the uterus 
A) preventing ovulation 
B) preventing implantation of an embryo 
C) stimulating the production of sperm-killing antibodies 
D) preventing the movement of sperm into the uterus

Question 19

The "grandmother hypothesis" suggests that natural selection may have favored a woman ________.

Accepted Answer

A) moving away from her children and grandchildren 
B) focusing her energy on caring for her grandchildren, instead of producing more children 
C) focusing her energy on the production of as many children as possible before reaching menopause 
D) helping her sisters produce more children 
A) moving away from her children and grandchildren 
B) focusing her energy on caring for her grandchildren, instead of producing more children 
C) focusing her energy on the production of as many children as possible before reaching menopause 
D) helping her sisters produce more children

Question 20

At about what point in gestation can an ultrasound exam determine the sex of the fetus?

Accepted Answer

A) about 4 weeks after fertilization 
B) at the end of the first trimester 
C) about 20 weeks after fertilization 
D) at the end of the second trimester 
A) about 4 weeks after fertilization 
B) at the end of the first trimester 
C) about 20 weeks after fertilization 
D) at the end of the second trimester

Exam 26: Reproduction and Development

Which one of the following is the earliest event in the process of fertilization?

The puffy circular structure represents the transformation of a structure previously called the ________.

Which statement about a birth control method is TRUE?

The figure shows oogenesis. What is the function of the polar bodies that are produced during oogenesis? They are a mechanism that allows for ________.

The three stages of labor, in the proper order are ________.

All of these are similarities between the male and female system EXCEPT one. Choose the exception.

What process dominates the third trimester of human development?

When does the human embryo implant in the wall of the uterus?

Embryo implantation normally occurs in the ________.

According to the diagram, after a vasectomy (within the scrotal sac), ________.

Which of these events occurs first?

Which STD is NOT caused by a virus?

Which reproduction method is associated with sexual reproduction?

Cleavage results in ________.

Which outcome is a result of programmed cell death?

Mesoderm gives rise to the ________.

What advantage is associated with human testes located in an external sac rather than in the abdominal cavity?

The "grandmother hypothesis" suggests that natural selection may have favored a woman ________.

At about what point in gestation can an ultrasound exam determine the sex of the fetus?

Learning About Life

Essential Chemistry for Biology

The Molecules of Life

A Tour of the Cell

The Working Cell

Cellular Respiration: Obtaining Energy From Food

Photosynthesis: Using Light to Make Food

Cellular Reproduction: Cells From Cells

Patterns of Inheritance

The Structure and Function of Dna

How Genes Are Controlled

Dna Technology

How Populations Evolve

How Biological Diversity Evolves

The Evolution of Microbial Life

The Evolution of Plants and Fungi

The Evolution of Animals

An Introduction to Ecology and the Biosphere

Population Ecology

Communities and Ecosystems

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Circulation and Respiration

The Bodys Defenses

Hormones

Nervous, Sensory, and Locomotor Systems

The Life of a Flowering Plant

The Working Plant

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