Question 1

Proteins called ________ bind to the DNA near the promoter regions where gene transcription begins.

Accepted Answer

transcript...

Question 2

During the embryonic stage, a hollow ball of cells is known as a:

Accepted Answer

A)  morula.
B)  blastula.
C)  gastrula.
D)  larva.
E)  blastopore.F) D) and E)
G) All of the above

Question 3

-The structure labeled 2 is the:

Accepted Answer

A)  chorion.
B)  amnion.
C)  embryo.
D)  allantois.
E)  yolk sac.F) None of the above
G) A) and B)

Question 4

The dorsal lip of the blastopore:

Accepted Answer

A)  becomes the neural tube.
B)  becomes the digestive tract.
C)  induces the surrounding cells to differentiate.
D)  forms the chorion.
E)  lacks the genes necessary to develop the embryo.F) B) and C)
G) B) and E)

Question 5

Adult stem cells derived from fat cells have been used to develop muscle and nerve cells in the lab. How is this possible?

Accepted Answer

Since all cells contain all th...

Question 6

Which portion of the blastula becomes the embryonic placenta?

Accepted Answer

A)  chorion
B)  embryonic disc
C)  inner cell mass
D)  primitive streak
E)  yolk sacF) C) and D)
G) A) and E)

Question 7

The amnion forms the watery environment that encloses the embryo. True or False?

Accepted Answer

A) True 
 B)False

Question 8

The small hollow ball of cells in early development is the zygote. True or False?

Accepted Answer

A) True 
 B)False

Question 9

The extraembryonic membrane that sends blood vessels into the endometrium is the chorion. True or False?

Accepted Answer

A) True 
 B)False

Question 10

In humans, implantation occurs:

Accepted Answer

A)  just prior to fertilization.
B)  immediately after fertilization.
C)  when the embryo is a blastocyst.
D)  when the embryo is a gastrula.
E)  after the formation of the neural tube.F) B) and D)
G) A) and C)

Question 11

At what stage does a human embryo implant in the uterus?

Accepted Answer

A)  gastrula
B)  embryonic disc
C)  morula
D)  blastocyst
E)  fetalF) A) and B)
G) All of the above

Question 12

In a reptile egg, which membrane is analogous to a lung?

Accepted Answer

A)  allantois
B)  amnion
C)  chorion
D)  yolk sac
E)  blastoporeF) All of the above
G) B) and C)

Question 13

Which of the following is the result of gastrulation?

Accepted Answer

A)  a morula
B)  a zygote
C)  the formation of organs
D)  a three-layered embryo
E)  a blastulaF) A) and B)
G) A) and C)

Question 14

A human embryo has webbed fingers. Why are human babies not usually born with webbed fingers?

Accepted Answer

During development, ...

Question 15

What is differentiation?

Accepted Answer

A)  the process in which different tissues specialize into specific organs
B)  the process in which different cells develop into different cell types
C)  the process in which different organs specialize in function
D)  the process in which the embryo specializes into different sexual organsE) C) and D)
F) A) and D)

Question 16

At the blastula stage, the embryo consists of:

Accepted Answer

A)  a solid mass of cells, each the size of the zygote.
B)  three differentiated layers of cells.
C)  a hollow ball of cells.
D)  cells that have different DNA content.
E)  a cluster of cells that are much larger than normal cells.F) C) and D)
G) All of the above

Question 17

The mother's part of the placenta is derived from the ________.

Accepted Answer

The answer of The mother's part of the placenta is...

Question 18

All the cells in an animal are genetically identical. True or False?

Accepted Answer

A) True 
 B)False

Question 19

At which stage is the human embryo most susceptible to damage?

Accepted Answer

A)  just before birth
B)  during cleavage
C)  during organogenesis
D)  during the fourth and fifth months
E)  during the last trimesterF) B) and D)
G) A) and B)

Question 20

A recent series of TV commercials promoted the idea that a woman who wants to have a healthy baby must begin to eat well and avoid some medications and alcohol before she knows she is pregnant. Why?

Accepted Answer

Gastrulation and differentiation of embr...

Exam 42: Animal Development

Which of the following is the result of gastrulation?

Correct AnswerverifiedShow Answer

The amnion forms the watery environment that encloses the embryo. True or False?

Correct AnswerverifiedShow Answer

A recent series of TV commercials promoted the idea that a woman who wants to have a healthy baby must begin to eat well and avoid some medications and alcohol before she knows she is pregnant. Why?

Correct AnswerverifiedGastrulation and differentiation of embr...View AnswerShow Answer

The dorsal lip of the blastopore:

Correct AnswerverifiedShow Answer

The extraembryonic membrane that sends blood vessels into the endometrium is the chorion. True or False?

Correct AnswerverifiedShow Answer

In humans, implantation occurs:

Correct AnswerverifiedShow Answer

-The structure labeled 2 is the:

Correct AnswerverifiedShow Answer

The mother's part of the placenta is derived from the ________.

Correct AnswerverifiedShow Answer

Proteins called ________ bind to the DNA near the promoter regions where gene transcription begins.

Correct Answerverifiedtranscript...View AnswerShow Answer

A human embryo has webbed fingers. Why are human babies not usually born with webbed fingers?

Correct AnswerverifiedDuring development, ...View AnswerShow Answer

What is differentiation?

Correct AnswerverifiedShow Answer

At which stage is the human embryo most susceptible to damage?

Correct AnswerverifiedShow Answer

All the cells in an animal are genetically identical. True or False?

Correct AnswerverifiedShow Answer

At what stage does a human embryo implant in the uterus?

Correct AnswerverifiedShow Answer

Which portion of the blastula becomes the embryonic placenta?

Correct AnswerverifiedShow Answer

Adult stem cells derived from fat cells have been used to develop muscle and nerve cells in the lab. How is this possible?

Correct AnswerverifiedSince all cells contain all th...View AnswerShow Answer

In a reptile egg, which membrane is analogous to a lung?

Correct AnswerverifiedShow Answer

During the embryonic stage, a hollow ball of cells is known as a:

Correct AnswerverifiedShow Answer

The small hollow ball of cells in early development is the zygote. True or False?

Correct AnswerverifiedShow Answer

At the blastula stage, the embryo consists of:

Correct AnswerverifiedShow Answer

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Gastrulation and differentiation of embr...
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transcript...
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During development, ...
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Since all cells contain all th...
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