Question 1

By the end of the eighth week of development,all organ systems are developed in the embryo.

Accepted Answer

A) True 
 B)False

Question 2

The phenomenon of apoptosis or cell death

Accepted Answer

A)  is a mechanism present in every cell that occurs when an inhibitory protein is inactivated.
B)  occurs when the cellular machinery simply wears out and the cell dies from being unable to continue vital processes.
C)  occurs when the ability of the cell to repair DNA mutations finally fails.
D)  is a disease phenomenon and cell death is always a bad trait.
E)  is not yet understood but probably involves the failure of the homeobox to correctly control development.F) D) and E)
G) C) and E)

Question 3

Identify and briefly describe the labeled structures in the cross section of the vertebrate embryo.

Accepted Answer

A.neural tube: The neural tube is formed...

Question 4

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

Accepted Answer

A)  archenteron
B)  blastopore
C)  chorion
D)  trophoblast
E)  inner cell massF) A) and B)
G) A) and C) E

Question 5

Development of the neural system is characterized by

Accepted Answer

A)  cell division and growth in size.
B)  cells becoming specialized in structure and function.
C)  body parts being shaped and patterned into a specific form.
D)  All of the choices are correct.
E)  None of the choices are correct.F) C) and D)
G) A) and B)

Question 6

Which of the following stages of embryonic development consists of only two layers of cells?

Accepted Answer

A)  morula
B)  blastula
C)  early gastrula
D)  late gastrulaE) None of the above
F) All of the above

Question 7

Generally,only one sperm fertilizes an egg because

Accepted Answer

A)  sperm are so few that two are unlikely to arrive at the same time.
B)  sperm compete against one another before entering,and only the most fit one is accepted.
C)  one small entry hole called the blastopore allows only one sperm to fit through and then seals.
D)  many sperm enter but only one set of chromosomes can fuse with the egg nucleus; the other sperm are absorbed.
E)  when the first sperm membrane fuses with the egg membrane,it forms a fertilization membrane,which blocks penetration by other sperm.F) A) and D)
G) A) and E)

Question 8

The coelomic cavity is derived from the

Accepted Answer

A)  blastocoel.
B)  folding of the neural tube.
C)  splitting of the mesoderm.
D)  elimination of the yolk sac nutrients.
E)  space left after organs develop.F) C) and D)
G) None of the above

Question 9

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Accepted Answer

A)  a diet that consists of dark green vegetables,nuts,and red wine
B)  a diet that has a high level of cholesterol
C)  a moderate exercise program
D)  All of these will help slow the aging process.
E)  None of these will help slow the aging process.F) B) and C)
G) A) and B)

Question 10

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

Accepted Answer

A) True 
 B)False

Question 11

List the correct order of steps in the development of the central nervous system of a vertebrate.

Accepted Answer

a.Thickening of cells on the dorsal surf...

Question 12

The ________ develops into the fetal portion of the placenta.

Accepted Answer

A)  amnion
B)  archenteron
C)  chorion
D)  yolk sac
E)  allantoisF) A) and E)
G) C) and E)

Question 13

What is the correct series of events during parturition? 
a.The amnion breaks.
B.The cervix dilates.
C.ACTH causes the adrenal cortex to release androgens into the bloodstream.
D.Prostaglandins and oxytocin are produced.
E.The baby is born and the umbilical cord is cut.
F.The placenta is delivered.

Accepted Answer

A)  c - d - b - a - e - f
B)  c - d - a -b - e - f
C)  a - d - b - c - e - f
D)  c - d - b - f - a - e
E)  c - b - f - a - e - dF) B) and C)
G) C) and D) A

Question 14

Which stage would show the development of the ectoderm and endoderm germ layers?

Accepted Answer

A)  early gastrulation
B)  neurulation
C)  blastulation
D)  late gastrulationE) None of the above
F) A) and D)

Question 15

Which structure is NOT associated with the development of the central nervous system in vertebrates?

Accepted Answer

A)  notochord
B)  neural plate
C)  neural tube
D)  ectodermE) All of the above
F) None of the above A

Question 16

Which body system develops first in a human embryo?

Accepted Answer

A)  reproductive
B)  circulatory
C)  nervous
D)  respiratory
E)  excretoryF) A) and C)
G) All of the above

Question 17

Identify the correct order of steps in the development of the central nervous system. 
a.Neural folds develop on either side of the neural groove
B.The neural tube forms
C.Thickening of cells on the dorsal surface called the neural plate occurs
D.The anterior end of the neural tube develops into the brain

Accepted Answer

A)  c - a - b - d
B)  c - a - d - b
C)  a - c - b - d
D)  a - b - c- d
E)  d - c - b - aF) A) and D)
G) C) and D)

Question 18

Morphogenesis is characterized by

Accepted Answer

A)  cell division and growth in size.
B)  cells becoming specialized in structure and function.
C)  body parts being shaped and patterned into a specific form.
D)  All of the choices are correct.
E)  None of the choices are correct.F) B) and E)
G) B) and D)

Question 19

List the correct order of steps of morphogenesis in Drosophila melanogaster.

Accepted Answer

a.Establishment of anterior/posterior ax...

Question 20

At ________ weeks,the fetal heartbeat can first be heard through a stethoscope.

Accepted Answer

A)  4
B)  25
C)  16
D)  12
E)  30F) B) and D)
G) All of the above

Exam 42: Animal Development and Aging

By the end of the eighth week of development,all organ systems are developed in the embryo.

Correct Answer
verified

The phenomenon of apoptosis or cell death

Correct Answer
verified

Identify and briefly describe the labeled structures in the cross section of the vertebrate embryo.

Correct Answer
verified
A.neural tube: The neural tube is formed...
View Answer

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

Correct Answer
verified
E

Development of the neural system is characterized by

Correct Answer
verified

Which of the following stages of embryonic development consists of only two layers of cells?

Correct Answer
verified

Generally,only one sperm fertilizes an egg because

Correct Answer
verified

The coelomic cavity is derived from the

Correct Answer
verified

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Correct Answer
verified

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

Correct Answer
verified

List the correct order of steps in the development of the central nervous system of a vertebrate.

Correct Answer
verified
a.Thickening of cells on the dorsal surf...
View Answer

The ________ develops into the fetal portion of the placenta.

Correct Answer
verified

What is the correct series of events during parturition? a.The amnion breaks. B.The cervix dilates. C.ACTH causes the adrenal cortex to release androgens into the bloodstream. D.Prostaglandins and oxytocin are produced. E.The baby is born and the umbilical cord is cut. F.The placenta is delivered.

Correct Answer
verified
A

Which stage would show the development of the ectoderm and endoderm germ layers?

Correct Answer
verified

Which structure is NOT associated with the development of the central nervous system in vertebrates?

Correct Answer
verified
A

Which body system develops first in a human embryo?

Correct Answer
verified

Correct Answer
verified

Morphogenesis is characterized by

Correct Answer
verified

List the correct order of steps of morphogenesis in Drosophila melanogaster.

Correct Answer
verified
a.Establishment of anterior/posterior ax...
View Answer

At ________ weeks,the fetal heartbeat can first be heard through a stethoscope.

Correct Answer
verified

Exam 42: Animal Development and Aging

By the end of the eighth week of development,all organ systems are developed in the embryo.

Correct AnswerverifiedShow Answer

The phenomenon of apoptosis or cell death

Correct AnswerverifiedShow Answer

Identify and briefly describe the labeled structures in the cross section of the vertebrate embryo.

Correct AnswerverifiedA.neural tube: The neural tube is formed...View AnswerShow Answer

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

Correct AnswerverifiedE

Development of the neural system is characterized by

Correct AnswerverifiedShow Answer

Which of the following stages of embryonic development consists of only two layers of cells?

Correct AnswerverifiedShow Answer

Generally,only one sperm fertilizes an egg because

Correct AnswerverifiedShow Answer

The coelomic cavity is derived from the

Correct AnswerverifiedShow Answer

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Correct AnswerverifiedShow Answer

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

Correct AnswerverifiedShow Answer

List the correct order of steps in the development of the central nervous system of a vertebrate.

Correct Answerverifieda.Thickening of cells on the dorsal surf...View AnswerShow Answer

The ________ develops into the fetal portion of the placenta.

Correct AnswerverifiedShow Answer

What is the correct series of events during parturition? a.The amnion breaks. B.The cervix dilates. C.ACTH causes the adrenal cortex to release androgens into the bloodstream. D.Prostaglandins and oxytocin are produced. E.The baby is born and the umbilical cord is cut. F.The placenta is delivered.

Correct AnswerverifiedA

Which stage would show the development of the ectoderm and endoderm germ layers?

Correct AnswerverifiedShow Answer

Which structure is NOT associated with the development of the central nervous system in vertebrates?

Correct AnswerverifiedA

Which body system develops first in a human embryo?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Morphogenesis is characterized by

Correct AnswerverifiedShow Answer

List the correct order of steps of morphogenesis in Drosophila melanogaster.

Correct Answerverifieda.Establishment of anterior/posterior ax...View AnswerShow Answer

At ________ weeks,the fetal heartbeat can first be heard through a stethoscope.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
verified
A.neural tube: The neural tube is formed...
View Answer

Correct Answer
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E

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Correct Answer
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verified
a.Thickening of cells on the dorsal surf...
View Answer

Correct Answer
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Correct Answer
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A

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A

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a.Establishment of anterior/posterior ax...
View Answer

Correct Answer
verified