Question 1

In humans, the allantois:

Accepted Answer

A)  stores embryonic nitrogenous wastes. 
B)  eliminates nitrogenous wastes from the embryo. 
C)  contributes to the formation of the blood vessels in the umbilical cord. 
D)  secretes amniotic fluid. 
E)  serves as a temporary center for formation of blood cells. 
A)  stores embryonic nitrogenous wastes. 
B)  eliminates nitrogenous wastes from the embryo. 
C)  contributes to the formation of the blood vessels in the umbilical cord. 
D)  secretes amniotic fluid. 
E)  serves as a temporary center for formation of blood cells.

Question 2

Which of the following statements about the notochord is false?

Accepted Answer

A)  It is lost when it is replaced by the vertebral column. 
B)  It develops in chordate embryos. 
C)  It develops from mesodermal tissue. 
D)  It induces formation of the neural plate. 
E)  It grows along the longitudinal axis of the organism. 
A)  It is lost when it is replaced by the vertebral column. 
B)  It develops in chordate embryos. 
C)  It develops from mesodermal tissue. 
D)  It induces formation of the neural plate. 
E)  It grows along the longitudinal axis of the organism.

Question 3

Following cleavage of the zygote, which of the following is the first to occur?

Accepted Answer

A)  blastula 
B)  gastrula 
C)  neural crest 
D)  morula 
E)  primitive streak 
A)  blastula 
B)  gastrula 
C)  neural crest 
D)  morula 
E)  primitive streak

Question 4

Describe the mechanisms that lead to multiple births.

Accepted Answer

Concepts to Consider: Monozygotic (ident

Question 5

The morula can be described as an embryo consisting of a hollow sphere of cells.
____________________

Accepted Answer

A) True 
 B)False

Question 6

MATCHING
Match the stage of embryonic development with its description.
a.blastula
c.morula
b.gastrula
d.stage of organogenesis
-produced by the process of invagination

Accepted Answer

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

Question 7

Which of the following is the correct sequence through which early development proceeds?

Accepted Answer

A)  morula $\rightarrow$ zygote $\rightarrow$ gastrula $\rightarrow$ blastula 
B)  zygote $\rightarrow$ blastula $\rightarrow$ morula $\rightarrow$gastrula 
C)  zygote $\rightarrow$blastula $\rightarrow$ gastrula $\rightarrow$morula 
D)  zygote $\rightarrow$ gastrula $\rightarrow$ blastula $\rightarrow$morula 
E)  zygote $\rightarrow$ morula $\rightarrow$ blastula $\rightarrow$gastrula 
A)  morula $\rightarrow$ zygote $\rightarrow$ gastrula $\rightarrow$ blastula 
B)  zygote $\rightarrow$ blastula $\rightarrow$ morula $\rightarrow$gastrula 
C)  zygote $\rightarrow$blastula $\rightarrow$ gastrula $\rightarrow$morula 
D)  zygote $\rightarrow$ gastrula $\rightarrow$ blastula $\rightarrow$morula 
E)  zygote $\rightarrow$ morula $\rightarrow$ blastula $\rightarrow$gastrula

Question 8

The extraembryonic membrane closest to the embryo is the:

Accepted Answer

A)  amnion. 
B)  archenteron. 
C)  chorion. 
D)  blastocyst. 
E)  neural plate. 
A)  amnion. 
B)  archenteron. 
C)  chorion. 
D)  blastocyst. 
E)  neural plate.

Question 9

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

Accepted Answer

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

Question 10

Place the following in developmental order beginning with the earliest event. 1)
Limb buds appear
2)
Face begins to look human
3)
Muscles differentiate
4)
Downy hair covers the fetus
5)
Sex can be determined by external inspection

Accepted Answer

A)  3, 1, 2, 4, 5 
B)  1, 3, 4, 2, 5 
C)  1, 3, 2, 5, 4 
D)  1, 2, 3, 4, 5 
E)  1, 3, 5, 2, 4 
A)  3, 1, 2, 4, 5 
B)  1, 3, 4, 2, 5 
C)  1, 3, 2, 5, 4 
D)  1, 2, 3, 4, 5 
E)  1, 3, 5, 2, 4

Question 11

Which of the following consists of a hollow ball of cells?

Accepted Answer

A)  gastrula 
B)  morula 
C)  blastula 
D)  blastocoel 
E)  zygote 
A)  gastrula 
B)  morula 
C)  blastula 
D)  blastocoel 
E)  zygote

Question 12

Which of the following structures will be the most immediate precursor of the brain?

Accepted Answer

A)  neural tube 
B)  neural groove 
C)  neural crest 
D)  neural folds 
E)  neural plate 
A)  neural tube 
B)  neural groove 
C)  neural crest 
D)  neural folds 
E)  neural plate

Question 13

Embryonic endoderm gives rise to:

Accepted Answer

A)  muscle. 
B)  the lining of the digestive tract. 
C)  the nervous system. 
D)  skin. 
E)  skeletal tissue. 
A)  muscle. 
B)  the lining of the digestive tract. 
C)  the nervous system. 
D)  skin. 
E)  skeletal tissue.

Question 14

Which of the following teratogens is specifically linked to high rates of fetal mortality?

Accepted Answer

A)  heroin 
B)  thalidomide 
C)  HIV 
D)  cocaine 
E)  ionizing radiation 
A)  heroin 
B)  thalidomide 
C)  HIV 
D)  cocaine 
E)  ionizing radiation

Question 15

Figure 51-1
Use the figure to answer the corresponding question(s).  
-The type of cleavage pattern represented in Figure 51-1 is:

Accepted Answer

A)  holoblastic and radial. 
B)  holoblastic and spiral. 
C)  meroblastic and radial. 
D)  meroblastic and spiral. 
E)  holoblastic and mosaic. 
A)  holoblastic and radial. 
B)  holoblastic and spiral. 
C)  meroblastic and radial. 
D)  meroblastic and spiral. 
E)  holoblastic and mosaic.

Question 16

Which of the following indicates the correct sequence of sea urchin egg coverings, beginning at the outside and moving inward?

Accepted Answer

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

Question 17

When a human embryo is implanted in the uterus, the embryo is in the morula stage.
____________________

Accepted Answer

A) True 
 B)False

Question 18

The term "archenteron" refers to the developing:

Accepted Answer

A)  gut. 
B)  lung. 
C)  notochord. 
D)  nerve tube. 
E)  skin. 
A)  gut. 
B)  lung. 
C)  notochord. 
D)  nerve tube. 
E)  skin.

Question 19

Which of the following statements concerning fertilization is false?

Accepted Answer

A)  Fertilization restores the diploid chromosome number. 
B)  Fertilization stimulates the initiation of development. 
C)  Fertilization can determine the sex of the offspring. 
D)  Fertilization permits the formation of gametes with new genetic combinations. 
E)  In fertilization, a sperm fuses with an ovum to produce a zygote. 
A)  Fertilization restores the diploid chromosome number. 
B)  Fertilization stimulates the initiation of development. 
C)  Fertilization can determine the sex of the offspring. 
D)  Fertilization permits the formation of gametes with new genetic combinations. 
E)  In fertilization, a sperm fuses with an ovum to produce a zygote.

Question 20

Which of the following is not a function of the placenta?

Accepted Answer

A)  exchanges blood between mother and fetus 
B)  secretes hormones to maintain pregnancy 
C)  provides oxygen for the fetus 
D)  eliminates wastes from the fetus 
E)  provides nutrients for the fetus 
A)  exchanges blood between mother and fetus 
B)  secretes hormones to maintain pregnancy 
C)  provides oxygen for the fetus 
D)  eliminates wastes from the fetus 
E)  provides nutrients for the fetus

Exam 51: Animal Development

In humans, the allantois:

Which of the following statements about the notochord is false?

Following cleavage of the zygote, which of the following is the first to occur?

Describe the mechanisms that lead to multiple births.

The morula can be described as an embryo consisting of a hollow sphere of cells. ____________________

MATCHING Match the stage of embryonic development with its description. a.blastula c.morula b.gastrula d.stage of organogenesis -produced by the process of invagination

Which of the following is the correct sequence through which early development proceeds?

The extraembryonic membrane closest to the embryo is the:

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

Place the following in developmental order beginning with the earliest event. 1) Limb buds appear 2) Face begins to look human 3) Muscles differentiate 4) Downy hair covers the fetus 5) Sex can be determined by external inspection

Which of the following consists of a hollow ball of cells?

Which of the following structures will be the most immediate precursor of the brain?

Embryonic endoderm gives rise to:

Which of the following teratogens is specifically linked to high rates of fetal mortality?

Figure 51-1 Use the figure to answer the corresponding question(s). -The type of cleavage pattern represented in Figure 51-1 is:

Which of the following indicates the correct sequence of sea urchin egg coverings, beginning at the outside and moving inward?

When a human embryo is implanted in the uterus, the embryo is in the morula stage. ____________________

The term "archenteron" refers to the developing:

Which of the following statements concerning fertilization is false?

Which of the following is not a function of the placenta?

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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