Question 1

A ________ is the immature stage of an animal that undergoes indirect development.

Accepted Answer

The answer of A ________ is the immature stage of...

Question 2

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

Accepted Answer

A)  Blastulation
B)  Metamorphosis
C)  Gastrulation
D)  Cleavage
E)  InductionF) B) and E)
G) B) and D)

Question 3

The ________ is the baby's contribution to the placenta.

Accepted Answer

chorion

Question 4

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

Accepted Answer

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

Question 5

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)  neural tube.
B)  gill grooves.
C)  allantois.
D)  placenta.
E)  embryonic disc.F) B) and D)
G) A) and E)

Question 6

In a bird egg, the ________ provides the watery environment in which the embryo develops.

Accepted Answer

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

Question 7

Why should a woman who plans to become pregnant notify her health care provider of any medications she is taking?

Accepted Answer

Many medications can...

Question 8

How does direct development of an embryo differ from indirect development?

Accepted Answer

In direct development, the embryo develops to the point of resembling a small adult. In indirect development, the early forms of the organism do not look like the adult form and must go through a metamorphosis to become an adult.

Question 9

The blastopore forms during gastrulation. True or False?

Accepted Answer

A) True 
 B)False

Question 10

A developing human is considered an embryo after ________ weeks.

Accepted Answer

A)  2
B)  4
C)  8
D)  12
E)  16F) A) and B)
G) A) and D)

Question 11

Transplanting embryonic eye tissue into the back of a developing tadpole will cause a lens to grow on the back of the tadpole. This is an example of:

Accepted Answer

A)  metamorphosis.
B)  programmed cell death.
C)  induction.
D)  cleavage.
E)  gastrulation.F) B) and E)
G) B) and C)

Question 12

The most rapid differentiation in an embryo occurs during the first two months of pregnancy. True or False?

Accepted Answer

A) True 
 B)False

Question 13

Suppose a mutant fish embryo does not form an endoderm, yet the embryo continues to develop. Which of the following structures might the embryo lack?

Accepted Answer

A)  skin
B)  heart
C)  nervous system
D)  stomach
E)  kidneysF) C) and E)
G) A) and B)

Question 14

The function of structure 1 is to:

Accepted Answer

A)  form the maternal component of the placenta.
B)  provide nutrients to the embryo before implantation.
C)  enclose the embryo in a liquid environment.
D)  store metabolic wastes.
E)  exchange nutrients and wastes between mother and embryo.F) B) and C)
G) A) and E) E

Question 15

If your roommate smokes and she gets pregnant, what dangers would you warn her about?

Accepted Answer

Smoking during pregnancy leads...

Question 16

Human embryos differ from bird embryos in that:

Accepted Answer

A)  bird embryos have an extra membrane, the allantois, that is not found in human embryos.
B)  human embryos have no yolk sac.
C)  human embryos have a yolk sac, but it contains no yolk.
D)  human embryos do not develop into a primitive streak stage.
E)  bird embryos develop a very different body structure than the adult.F) B) and D)
G) D) and E)

Question 17

The nervous system develops from the endoderm. True or False?

Accepted Answer

A) True 
 B)False

Question 18

If an embryo divides into three during the morula stage:

Accepted Answer

A)  the embryos will die.
B)  the embryos will develop severe birth defects due to missing genes.
C)  normal identical triplets will be born.
D)  three distinctly different embryos will develop, depending on which homeoboxes went with which cell group.
E)  the embryos will develop, but they may be missing some organs based on which germ layers were transferred with each section.F) A) and B)
G) D) and E)

Question 19

If a cell divides by mitosis so that one cell eventually becomes part of the brain and the other cell becomes part of a salivary gland, the cells have:

Accepted Answer

A)  lost genes.
B)  increased their genetic variability.
C)  diffused.
D)  taken up genes from surrounding cells.
E)  differentiated.F) A) and B)
G) A) and C)

Question 20

________ diffuse(s) from fetal blood to maternal blood in the placenta.

Accepted Answer

A)  Oxygen
B)  Wastes
C)  Alcohol
D)  Infectious organisms
E)  NutrientsF) A) and C)
G) B) and E)

Exam 42: Animal Development

A ________ is the immature stage of an animal that undergoes indirect development.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The ________ is the baby's contribution to the placenta.

Correct Answerverifiedchorion

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

In a bird egg, the ________ provides the watery environment in which the embryo develops.

Correct AnswerverifiedShow Answer

Why should a woman who plans to become pregnant notify her health care provider of any medications she is taking?

Correct AnswerverifiedMany medications can...View AnswerShow Answer

How does direct development of an embryo differ from indirect development?

Correct AnswerverifiedIn direct development, the embryo develops to the point of resembling a small adult. In indirect development, the early forms of the organism do not look like the adult form and must go through a metamorphosis to become an adult.

The blastopore forms during gastrulation. True or False?

Correct AnswerverifiedShow Answer

A developing human is considered an embryo after ________ weeks.

Correct AnswerverifiedShow Answer

Transplanting embryonic eye tissue into the back of a developing tadpole will cause a lens to grow on the back of the tadpole. This is an example of:

Correct AnswerverifiedShow Answer

The most rapid differentiation in an embryo occurs during the first two months of pregnancy. True or False?

Correct AnswerverifiedShow Answer

Suppose a mutant fish embryo does not form an endoderm, yet the embryo continues to develop. Which of the following structures might the embryo lack?

Correct AnswerverifiedShow Answer

The function of structure 1 is to:

Correct AnswerverifiedE

If your roommate smokes and she gets pregnant, what dangers would you warn her about?

Correct AnswerverifiedSmoking during pregnancy leads...View AnswerShow Answer

Human embryos differ from bird embryos in that:

Correct AnswerverifiedShow Answer

The nervous system develops from the endoderm. True or False?

Correct AnswerverifiedShow Answer

If an embryo divides into three during the morula stage:

Correct AnswerverifiedShow Answer

If a cell divides by mitosis so that one cell eventually becomes part of the brain and the other cell becomes part of a salivary gland, the cells have:

Correct AnswerverifiedShow Answer

________ diffuse(s) from fetal blood to maternal blood in the placenta.

Correct AnswerverifiedShow Answer

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chorion

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Many medications can...
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In direct development, the embryo develops to the point of resembling a small adult. In indirect development, the early forms of the organism do not look like the adult form and must go through a metamorphosis to become an adult.

Correct Answer
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E

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Smoking during pregnancy leads...
View Answer

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