Question 1

Mitotic cell divisions of the zygote are collectively called cleavage.

Accepted Answer

A) True 
 B)False

Question 2

A _ is a fertilized egg.

Accepted Answer

The answer of A _ is a fertilized egg....

Question 3

is the developmental event that results in the formation of a primitive gut and the three tissue layers.

Accepted Answer

A)   Metamorphosis
B)   Gastrulation
C)   Blastulation
D)   Induction
E)   Cleavage

Question 4

Which extraembryonic membrane lies immediately beneath the shell of a reptile embryo?

Accepted Answer

A)   Allantois
B)   Chorion
C)   Amnion
D)   Placenta
E)   Yolk sac

Question 5

If a cell lacks transcription factors, will never be transcribed.

Accepted Answer

The answer of If a cell lacks transcription factors, will...

Question 6

Prior to birth, stretching of the cervix by the baby's head stimulates the release of

Accepted Answer

A)   oxytocin.
B)   progesterone.
C)   estrogen.
D)   colostrum.
E)   prolactin.

Question 7

Your biceps muscle is derived from the

Accepted Answer

A)   ectoderm.
B)   amnion.
C)   mesoderm.
D)   endoderm.
E)   blastopore.

Question 8

During development, some cells , or specialize in both structure and function.

Accepted Answer

The answer of During development, some cells , or specialize...

Question 9

At which stage is the human embryo most susceptible to toxic substances?

Accepted Answer

A)   During organogenesis
B)   Just before birth
C)   During the last trimester
D)   During cleavage
E)   During the fourth and fifth months

Question 10

The cells of an aging animal function less efficiently because

Accepted Answer

A)   organelles and cellular components decline.
B)   cells can no longer mitotically divide.
C)   cell metabolism is slower.
D)   protein synthesis ceases.
E)   damaged DNA cannot be repaired.

Question 11

-Metabolic wastes may be stored within structure 4, the

Accepted Answer

A)   yolk sac.
B)   chorion.
C)   amnion.
D)   allantois.
E)   embryo.

Question 12

The nervous system forms from the

Accepted Answer

A)   ectoderm.
B)   mesoderm.
C)   chorion.
D)   yolk.
E)   endoderm.

Question 13

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

Accepted Answer

During development, ...

Question 14

The structure produced by cleavage of a human zygote is called a(n)

Accepted Answer

A)   embryonic disk.
B)   blastopore.
C)   blastocyst.
D)   chorion.
E)   gastrula.

Question 15

The extraembryonic membrane that sends blood vessels into the endometrium is the chorion.

Accepted Answer

A) True 
 B)False

Question 16

-The fluid the embryo floats in is produced by structure

Accepted Answer

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

Question 17

The birth defect spina bifida results in part of the spinal cord lying outside of the body. This defect is due to abnormal development of the

Accepted Answer

A)   placenta.
B)   neural tube.
C)   gill grooves.
D)   allantois.
E)   embryonic disk.

Question 18

The most rapid differentiation in an embryo occurs during the first 2 months of pregnancy.

Accepted Answer

A) True 
 B)False

Question 19

In the 1920s, two German embryologists, Hans Spemann and Hilde Mangold, demonstrated that a small patch of cells, called the dorsal lip of the blastopore, would

Accepted Answer

A)   become the neural tube.
B)   form the chorion.
C)   become the digestive tract.
D)   induce the surrounding cells to differentiate.
E)   lack the genes necessary to develop the embryo.

Question 20

Newborn animals that closely resemble the adults of their species undergo development.

Accepted Answer

The answer of Newborn animals that closely resemble the adults...

Exam 43: Animal Development

-Metabolic wastes may be stored within structure 4, the

Correct AnswerverifiedShow Answer

In the 1920s, two German embryologists, Hans Spemann and Hilde Mangold, demonstrated that a small patch of cells, called the dorsal lip of the blastopore, would

Correct AnswerverifiedShow Answer

Which extraembryonic membrane lies immediately beneath the shell of a reptile embryo?

Correct AnswerverifiedShow Answer

The birth defect spina bifida results in part of the spinal cord lying outside of the body. This defect is due to abnormal development of the

Correct AnswerverifiedShow Answer

The nervous system forms from the

Correct AnswerverifiedShow Answer

is the developmental event that results in the formation of a primitive gut and the three tissue layers.

Correct AnswerverifiedShow Answer

Your biceps muscle is derived from the

Correct AnswerverifiedShow Answer

Mitotic cell divisions of the zygote are collectively called cleavage.

Correct AnswerverifiedShow Answer

At which stage is the human embryo most susceptible to toxic substances?

Correct AnswerverifiedShow Answer

The extraembryonic membrane that sends blood vessels into the endometrium is the chorion.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedDuring development, ...View AnswerShow Answer

A _ is a fertilized egg.

Correct AnswerverifiedShow Answer

If a cell lacks transcription factors, will never be transcribed.

Correct AnswerverifiedShow Answer

The cells of an aging animal function less efficiently because

Correct AnswerverifiedShow Answer

The structure produced by cleavage of a human zygote is called a(n)

Correct AnswerverifiedShow Answer

Prior to birth, stretching of the cervix by the baby's head stimulates the release of

Correct AnswerverifiedShow Answer

Newborn animals that closely resemble the adults of their species undergo development.

Correct AnswerverifiedShow Answer

During development, some cells , or specialize in both structure and function.

Correct AnswerverifiedShow Answer

-The fluid the embryo floats in is produced by structure

Correct AnswerverifiedShow Answer

The most rapid differentiation in an embryo occurs during the first 2 months of pregnancy.

Correct AnswerverifiedShow Answer

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During development, ...
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