Question 1

In most animals, the sperm and egg contribute an equal __________ to the zygote.

Accepted Answer

A)  amount of cytoplasm 
B)  number of chromosomes 
C)  number of enzymes 
D)  number of mitochondria 
E)  number of ribosomes 
A)  amount of cytoplasm 
B)  number of chromosomes 
C)  number of enzymes 
D)  number of mitochondria 
E)  number of ribosomes

Question 2

During capacitation, sperm become mature.
____________________

Accepted Answer

A) True 
 B)False

Question 3

What is the function of the chorion?

Accepted Answer

A)  to absorb shock 
B)  to form blood cells 
C)  to provide nourishment 
D)  to permit freedom of movement 
E)  to permit gas exchange 
A)  to absorb shock 
B)  to form blood cells 
C)  to provide nourishment 
D)  to permit freedom of movement 
E)  to permit gas exchange

Question 4

Before a sperm can compete in fertilization, it must undergo a maturation process in the female reproductive tract known as:

Accepted Answer

A)  the acrosome reaction. 
B)  the cortical reaction. 
C)  spermatogenesis. 
D)  determination. 
E)  capacitation. 
A)  the acrosome reaction. 
B)  the cortical reaction. 
C)  spermatogenesis. 
D)  determination. 
E)  capacitation.

Question 5

As part of the fertilization process, the egg completes meiosis I.
____________________

Accepted Answer

A) True 
 B)False

Question 6

Hensen's node is located:

Accepted Answer

A)  in the walls of the archenteron. 
B)  at the end of the primitive streak. 
C)  on the outer side of the chorion. 
D)  inside a blastomere. 
E)  inside the neural groove. 
A)  in the walls of the archenteron. 
B)  at the end of the primitive streak. 
C)  on the outer side of the chorion. 
D)  inside a blastomere. 
E)  inside the neural groove.

Question 7

Which of the following is not part of the activation program of the egg?

Accepted Answer

A)  increase in aerobic respiration 
B)  capacitation 
C)  activation of enzymes 
D)  increase in protein synthesis 
E)  completion of meiosis 
A)  increase in aerobic respiration 
B)  capacitation 
C)  activation of enzymes 
D)  increase in protein synthesis 
E)  completion of meiosis

Question 8

In organogenesis, the ectoderm gives rise to:

Accepted Answer

A)  muscle. 
B)  the digestive tract. 
C)  sense organs. 
D)  the circulatory system. 
E)  skeletal tissue. 
A)  muscle. 
B)  the digestive tract. 
C)  sense organs. 
D)  the circulatory system. 
E)  skeletal tissue.

Question 9

What is cellular aging and what causes its occurrence?

Accepted Answer

Concepts to Consider: In cellular aging,

Question 10

Figure 51-2
Use the figure to answer the corresponding question(s).  
-The developmental stage represented in Figure 51-2 is:

Accepted Answer

A)  a morula. 
B)  an early blastula. 
C)  a late blastula. 
D)  an early gastrula. 
E)  a middle gastrula. 
A)  a morula. 
B)  an early blastula. 
C)  a late blastula. 
D)  an early gastrula. 
E)  a middle gastrula.

Question 11

Embryonic mesoderm forms the:

Accepted Answer

A)  epidermis. 
B)  lining of the digestive tract. 
C)  pituitary gland. 
D)  excretory system. 
E)  nervous system. 
A)  epidermis. 
B)  lining of the digestive tract. 
C)  pituitary gland. 
D)  excretory system. 
E)  nervous system.

Question 12

MATCHING
Match the stage of embryonic development with its description.
a.blastula
c.morula
b.gastrula
d.stage of organogenesis
-a three-layered embryo

Accepted Answer

The answer of MATCHING
Match the stage of embryonic development with...

Question 13

In sea urchins, the fertilization envelope forms from the:

Accepted Answer

A)  vitelline envelope. 
B)  jelly coat. 
C)  zona pellucida. 
D)  plasma membrane. 
E)  granulosa cells. 
A)  vitelline envelope. 
B)  jelly coat. 
C)  zona pellucida. 
D)  plasma membrane. 
E)  granulosa cells.

Question 14

The percentage of twins being born has increased in the past 20 years because of:

Accepted Answer

A)  the increased use of fertility inducing drugs. 
B)  increases in hospital care. 
C)  the desire of more couples to have twins. 
D)  the increased use of thalidomide. 
E)  the increased incidence of German measles. 
A)  the increased use of fertility inducing drugs. 
B)  increases in hospital care. 
C)  the desire of more couples to have twins. 
D)  the increased use of thalidomide. 
E)  the increased incidence of German measles.

Question 15

MATCHING
Match the stage of embryonic development with its description.
a.blastula
c.morula
b.gastrula
d.stage of organogenesis
-a solid ball of blastomeres

Accepted Answer

The answer of MATCHING
Match the stage of embryonic development with...

Question 16

Inside the zona pellucida is a layer of granulosa cells.
____________________

Accepted Answer

A) True 
 B)False

Question 17

The eggs of birds and reptiles are telolecithal.
____________________

Accepted Answer

A) True 
 B)False

Question 18

All of the following are functions of the extraembryonic membranes except:

Accepted Answer

A)  protecting the embryo. 
B)  making food available to the embryo. 
C)  eliminating wastes from the embryo. 
D)  keeping the embryo dry and warm. 
E)  obtaining oxygen for the embryo. 
A)  protecting the embryo. 
B)  making food available to the embryo. 
C)  eliminating wastes from the embryo. 
D)  keeping the embryo dry and warm. 
E)  obtaining oxygen for the embryo.

Question 19

A human embryo is capable of movement and has gonads that are distinguishable as either testes or ovaries by the end of the:

Accepted Answer

A)  second week. 
B)  fourth week. 
C)  sixth week. 
D)  eighth week. 
E)  first trimester. 
A)  second week. 
B)  fourth week. 
C)  sixth week. 
D)  eighth week. 
E)  first trimester.

Question 20

Which of the following is not considered part of the process of morphogenesis per se?

Accepted Answer

A)  Cells become specialized. 
B)  Cells migrate into specific areas. 
C)  Certain cells undergo changes in shape. 
D)  Cells become organized into intricate patterns of tissues and organs. 
E)  Some cells undergo apoptosis. 
A)  Cells become specialized. 
B)  Cells migrate into specific areas. 
C)  Certain cells undergo changes in shape. 
D)  Cells become organized into intricate patterns of tissues and organs. 
E)  Some cells undergo apoptosis.

Exam 51: Animal Development

In most animals, the sperm and egg contribute an equal __________ to the zygote.

During capacitation, sperm become mature. ____________________

What is the function of the chorion?

Before a sperm can compete in fertilization, it must undergo a maturation process in the female reproductive tract known as:

As part of the fertilization process, the egg completes meiosis I. ____________________

Hensen's node is located:

Which of the following is not part of the activation program of the egg?

In organogenesis, the ectoderm gives rise to:

What is cellular aging and what causes its occurrence?

Figure 51-2 Use the figure to answer the corresponding question(s). -The developmental stage represented in Figure 51-2 is:

Embryonic mesoderm forms the:

MATCHING Match the stage of embryonic development with its description. a.blastula c.morula b.gastrula d.stage of organogenesis -a three-layered embryo

In sea urchins, the fertilization envelope forms from the:

The percentage of twins being born has increased in the past 20 years because of:

MATCHING Match the stage of embryonic development with its description. a.blastula c.morula b.gastrula d.stage of organogenesis -a solid ball of blastomeres

Inside the zona pellucida is a layer of granulosa cells. ____________________

The eggs of birds and reptiles are telolecithal. ____________________

All of the following are functions of the extraembryonic membranes except:

A human embryo is capable of movement and has gonads that are distinguishable as either testes or ovaries by the end of the:

Which of the following is not considered part of the process of morphogenesis per se?

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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