Question 1

Early vertebrate embryos share a general similarity in shape in the period following somite development.

Accepted Answer

A) True 
 B)False  True

Question 2

How long is the DNA in the homeobox sequence?

Accepted Answer

A)  4 base pairs 
B)  68 base pairs 
C)  180 base pairs 
D)  362 base pairs 
A)  4 base pairs 
B)  68 base pairs 
C)  180 base pairs 
D)  362 base pairs C

Question 3

What are the three phases of early embryonic development in animals, and what key events occur during each phase?

Accepted Answer

The three phases of early embryonic development in animals are cleavage, gastrulation, and organogenesis. During cleavage, the zygote divides multiple times, producing a larger number of smaller cells. The result is a morula, a tightly packed ball of cells. Next, the morula develops a liquid-filled cavity (the blastocoel) and becomes a blastula. The second phase of early embryonic development is gastrulation, during which the three tissue layers-ectoderm, mesoderm, and endoderm-form. The gastrula also contains the archenteron, which will become the digestive tube. The third phase of early embryonic development is organogenesis. During organogenesis, the organs begin to form. In vertebrates, the first important event in organogenesis is the development of the neural tube, which represents the future brain and spinal cord.

Question 4

Which characteristic is typical of the vegetal pole of an embryo?

Accepted Answer

A)  The vegetal pole is composed of a single, large cell. 
B)  The vegetal pole is always hollow. 
C)  The vegetal pole contains relatively less yolk. 
D)  The vegetal pole has a relatively greater proportion of yolk. 
E)  The vegetal pole is the site of the development of the mouth. 
A)  The vegetal pole is composed of a single, large cell. 
B)  The vegetal pole is always hollow. 
C)  The vegetal pole contains relatively less yolk. 
D)  The vegetal pole has a relatively greater proportion of yolk. 
E)  The vegetal pole is the site of the development of the mouth.

Question 5

Match the following. Answers may be used more than once.
A) mesoderm
B) ectoderm
C) endoderm
-Liver and lungs

Accepted Answer

The answer of Match the following. Answers may be used...

Question 6

Which cells are most important in initiating the production of bicoid protein?

Accepted Answer

A)  limb bud cells 
B)  posterior portion cells 
C)  nurse cells 
D)  neural tube cells 
A)  limb bud cells 
B)  posterior portion cells 
C)  nurse cells 
D)  neural tube cells

Question 7

Refer to the figure below, and then answer the question that follows.  
-Which structure, A, B, C, or D, induces formation of the neural tube?

Accepted Answer

The answer of Refer to the figure below, and then...

Question 8

Predict what would happen if a fruit fly regulatory gene that codes for a leg replaced a frog gene in the same position.

Accepted Answer

A)  The frog would produce a fruit fly leg. 
B)  The gene would kill the frog embryo. 
C)  The frog would produce a frog leg. 
D)  The frog would produce a leg that is part frog and part insect. 
A)  The frog would produce a fruit fly leg. 
B)  The gene would kill the frog embryo. 
C)  The frog would produce a frog leg. 
D)  The frog would produce a leg that is part frog and part insect.

Question 9

Which of the following is true of the animal pole of a zygote?

Accepted Answer

A)  The animal pole is closer to the nucleus than the vegetal pole. 
B)  The animal pole is hollow. 
C)  The animal pole becomes the entire embryo. 
D)  The animal pole produces larger cells than the vegetal pole. 
A)  The animal pole is closer to the nucleus than the vegetal pole. 
B)  The animal pole is hollow. 
C)  The animal pole becomes the entire embryo. 
D)  The animal pole produces larger cells than the vegetal pole.

Question 10

Bicoid is only one type of morphogen.

Accepted Answer

A) True 
 B)False

Question 11

Gastrulation begins at the sea urchin blastula's vegetal pole.

Accepted Answer

A) True 
 B)False

Question 12

ZPA cells of the chick embryo produce which morphogen?

Accepted Answer

A)  sonic hedgehog 
B)  sonic chicken 
C)  bicoid 
D)  chicken wing factor 
A)  sonic hedgehog 
B)  sonic chicken 
C)  bicoid 
D)  chicken wing factor

Question 13

Even small concentrations of bicoid protein will cause the anterior portion of an organism to form there.

Accepted Answer

A) True 
 B)False

Question 14

What action by the individual cells involved can assist processes involving cell movement such as gastrulation?

Accepted Answer

A)  transcription factors 
B)  microfilament growth 
C)  invagination 
D)  evagination 
E)  phagocytosis 
A)  transcription factors 
B)  microfilament growth 
C)  invagination 
D)  evagination 
E)  phagocytosis

Question 15

Without cell adhesion, the primitive gut probably wouldn't develop during gastrulation.

Accepted Answer

A) True 
 B)False

Question 16

Match the following. Answers may be used more than once.
A) cleavage
B) organogenesis
C) gastrulation
-Neural crest cells migrate

Accepted Answer

The answer of Match the following. Answers may be used...

Question 17

The blastocoel is:

Accepted Answer

A)  a fertilized egg. 
B)  the group of cells that form the archenteron. 
C)  a fluid-filled cavity. 
D)  a hollow sphere of cells. 
A)  a fertilized egg. 
B)  the group of cells that form the archenteron. 
C)  a fluid-filled cavity. 
D)  a hollow sphere of cells.

Question 18

Of the choices listed, the first event that occurs during embryonic development is:

Accepted Answer

A)  germ layer formation. 
B)  blastula formation. 
C)  organogenesis. 
D)  cleavage. 
A)  germ layer formation. 
B)  blastula formation. 
C)  organogenesis. 
D)  cleavage.

Question 19

Cell death during development will always have negative, possibly fatal, effects on normal development.

Accepted Answer

A) True 
 B)False

Question 20

The blastula is the stage of embryonic development in which cells migrate.

Accepted Answer

A) True 
 B)False

Exam 32: An Amazingly Detailed Script: Animal Development

Early vertebrate embryos share a general similarity in shape in the period following somite development.

How long is the DNA in the homeobox sequence?

What are the three phases of early embryonic development in animals, and what key events occur during each phase?

Which characteristic is typical of the vegetal pole of an embryo?

Match the following. Answers may be used more than once. A) mesoderm B) ectoderm C) endoderm -Liver and lungs

Which cells are most important in initiating the production of bicoid protein?

Refer to the figure below, and then answer the question that follows. -Which structure, A, B, C, or D, induces formation of the neural tube?

Predict what would happen if a fruit fly regulatory gene that codes for a leg replaced a frog gene in the same position.

Which of the following is true of the animal pole of a zygote?

Bicoid is only one type of morphogen.

Gastrulation begins at the sea urchin blastula's vegetal pole.

ZPA cells of the chick embryo produce which morphogen?

Even small concentrations of bicoid protein will cause the anterior portion of an organism to form there.

What action by the individual cells involved can assist processes involving cell movement such as gastrulation?

Without cell adhesion, the primitive gut probably wouldn't develop during gastrulation.

Match the following. Answers may be used more than once. A) cleavage B) organogenesis C) gastrulation -Neural crest cells migrate

The blastocoel is:

Of the choices listed, the first event that occurs during embryonic development is:

Cell death during development will always have negative, possibly fatal, effects on normal development.

The blastula is the stage of embryonic development in which cells migrate.

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, Water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, Translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, Evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late, Traveling Far: the Evolution of Human Beings

Viruses, Bacteria, Archaea, and Protists: the Diversity of Life 1

Fungi : the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, Skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, Nutrition, and Elimination

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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