Question 1

Discuss the process of cytoplasmic specification and the role of differently pigmented cytoplasms.

Accepted Answer

Cytoplasmic specification is the process...

Question 2

In mammals,the organ of exchange between the mother and fetus is the

Accepted Answer

A)   amnion.
B)   placenta.
C)   chorion.
D)   yolk sac.E) C) and D)
F) B) and C)

Question 3

The point of fertilization occurs when

Accepted Answer

A)   sperm are deposited in the vagina.
B)   sperm reach the outer jelly coating of the egg.
C)   she sperm sheds the tail.
D)   the sperm nucleus and egg nucleus unite to form a zygote.E) B) and C)
F) A) and B)

Question 4

Throughout the descriptions of the various major animal taxa,the type of cleavage and the origin of the coelom are of foremost importance.Why are such esoteric developmental features central to classification compared to other prominent anatomical and physiological features that are only mentioned for a few major taxa?

Accepted Answer

The type of cleavage and the origin of t...

Question 5

A characteristic of development of Deuterostomia is

Accepted Answer

A)   spiral cleavage.
B)   mosaic development.
C)   the mesoderm developing from a special blastomere called the 4d cell.
D)   radial cleavage.E) B) and D)
F) B) and C)

Question 6

Cleavage on the surface of the yolk of the chicken egg is partial because cleavage furrows cannot cut through; this is called

Accepted Answer

A)   meroblastic.
B)   holoblastic.
C)   isolecithal.
D)   indeterminant.E) All of the above
F) A) and D)

Question 7

The placenta develops from

Accepted Answer

A)   fetal membranes only.
B)   maternal tissue only.
C)   both fetal and maternal tissue.
D)   polar bodies that develop just the placental tissues.E) B) and D)
F) A) and B)

Question 8

The difference between primary and secondary induction is a difference between

Accepted Answer

A)   "hard-wired" commands and chance development.
B)   effects of the dorsal lip organizer and effects of the subsequent cell's induction.
C)   nuclear and cytoplasmic determinants.
D)   homeotic pattern formation and regular structural gene effects.E) A) and B)
F) A) and C)

Question 9

Distinguish "germ cells" and "germ layers."

Accepted Answer

Germ cells and germ layers are two disti...

Question 10

In land vertebrates,the function of the chorion is to

Accepted Answer

A)   become umbilical cord.
B)   enclose the entire embryonic system and then fuse to form the chorioallantoic membrane.
C)   grow from the embryonic hindgut to become a repository for the wastes of metabolism.
D)   surround the embryo and provide a marine environment for development.E) C) and D)
F) All of the above

Question 11

Animals having radial cleavage (echinoderms)also show a type of development,called __________ _________,in which separated blastomeres can develop into complete and normal organisms.

Accepted Answer

regulative...

Question 12

A developmental stage comprised of a hollow ball of cells is the

Accepted Answer

A)   blastula.
B)   blastocoel.
C)   gastrula.
D)   neurula.E) A) and D)
F) A) and C)

Question 13

A true coelom is a fluid-filled cavity completely lined by ___________.

Accepted Answer

The answer of A true coelom is a fluid-filled cavity...

Question 14

Discuss or outline the derivatives of endoderm,mesoderm,and ectoderm.

Accepted Answer

The derivatives of the three primary ger...

Question 15

Cleavage in mammals

Accepted Answer

A)   is faster than most other groups.
B)   does not begin, like most other animals, with a first cleavage plane through the animal-vegetal axis.
C)   is asynchronous, meaning that all blastomeres do not divide at the same time.
D)   is very loose, with cells drifting about in a loose amorphous, bubble-like mass.E) A) and C)
F) All of the above

Question 16

The concept of ________ suggested that preformed animals in the egg unfolded during development.

Accepted Answer

The answer of The concept of ________ suggested that preformed...

Question 17

Outline the significance of the amniotic egg.Discuss the various layers and their functions in embryogenesis.

Accepted Answer

The amniotic egg is a significant develo...

Question 18

Contrast mosaic development with regulative development and indicate what animals would use each pattern of differentiation.Is one form of development "better" than another? Why or why not?

Accepted Answer

Mosaic development and regulative develo...

Question 19

In an amniotic egg,the amnion

Accepted Answer

A)   serves as a repository for wastes produced by the developing embryo.
B)   serves as a respiratory surface for the exchange of oxygen and carbon dioxide.
C)   is a fluid-filled sac that protects the embryo from shocks and adhesions.
D)   develops into the chorio-allantoic membrane.E) A) and B)
F) A) and C)

Question 20

The concept that an egg or sperm cell contained a very small but fully developed individual was called

Accepted Answer

A)   induction.
B)   pronuclei.
C)   preformation.
D)   holoblastism.E) None of the above
F) A) and C)

Exam 8: Principles of Development

Cleavage on the surface of the yolk of the chicken egg is partial because cleavage furrows cannot cut through; this is called

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The difference between primary and secondary induction is a difference between

Correct Answer
verified

Distinguish "germ cells" and "germ layers."

Correct Answer
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Germ cells and germ layers are two disti...
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Discuss the process of cytoplasmic specification and the role of differently pigmented cytoplasms.

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Answered by ExamLex AI
Cytoplasmic specification is the process...
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The concept that an egg or sperm cell contained a very small but fully developed individual was called

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Correct Answer
Answered by ExamLex AI
The type of cleavage and the origin of t...
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Discuss or outline the derivatives of endoderm,mesoderm,and ectoderm.

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The derivatives of the three primary ger...
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A characteristic of development of Deuterostomia is

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In an amniotic egg,the amnion

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Outline the significance of the amniotic egg.Discuss the various layers and their functions in embryogenesis.

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The amniotic egg is a significant develo...
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A true coelom is a fluid-filled cavity completely lined by ___________.

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The point of fertilization occurs when

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The concept of ________ suggested that preformed animals in the egg unfolded during development.

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verified

Animals having radial cleavage (echinoderms)also show a type of development,called __ _,in which separated blastomeres can develop into complete and normal organisms.

Correct Answer
verified
regulative...
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Contrast mosaic development with regulative development and indicate what animals would use each pattern of differentiation.Is one form of development "better" than another? Why or why not?

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Mosaic development and regulative develo...
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A developmental stage comprised of a hollow ball of cells is the

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The placenta develops from

Correct Answer
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Cleavage in mammals

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verified

In mammals,the organ of exchange between the mother and fetus is the

Correct Answer
verified

In land vertebrates,the function of the chorion is to

Correct Answer
verified

Exam 8: Principles of Development

Cleavage on the surface of the yolk of the chicken egg is partial because cleavage furrows cannot cut through; this is called

Correct AnswerverifiedShow Answer

The difference between primary and secondary induction is a difference between

Correct AnswerverifiedShow Answer

Distinguish "germ cells" and "germ layers."

Correct AnswerAnswered by ExamLex AIGerm cells and germ layers are two disti...View AnswerShow Answer

Discuss the process of cytoplasmic specification and the role of differently pigmented cytoplasms.

Correct AnswerAnswered by ExamLex AICytoplasmic specification is the process...View AnswerShow Answer

The concept that an egg or sperm cell contained a very small but fully developed individual was called

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Correct AnswerAnswered by ExamLex AIThe type of cleavage and the origin of t...View AnswerShow Answer

Discuss or outline the derivatives of endoderm,mesoderm,and ectoderm.

Correct AnswerAnswered by ExamLex AIThe derivatives of the three primary ger...View AnswerShow Answer

A characteristic of development of Deuterostomia is

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In an amniotic egg,the amnion

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Outline the significance of the amniotic egg.Discuss the various layers and their functions in embryogenesis.

Correct AnswerAnswered by ExamLex AIThe amniotic egg is a significant develo...View AnswerShow Answer

A true coelom is a fluid-filled cavity completely lined by ___________.

Correct AnswerverifiedShow Answer

The point of fertilization occurs when

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The concept of ________ suggested that preformed animals in the egg unfolded during development.

Correct AnswerverifiedShow Answer

Animals having radial cleavage (echinoderms)also show a type of development,called __________ _________,in which separated blastomeres can develop into complete and normal organisms.

Correct Answerverifiedregulative...View AnswerShow Answer

Contrast mosaic development with regulative development and indicate what animals would use each pattern of differentiation.Is one form of development "better" than another? Why or why not?

Correct AnswerAnswered by ExamLex AIMosaic development and regulative develo...View AnswerShow Answer

A developmental stage comprised of a hollow ball of cells is the

Correct AnswerverifiedShow Answer

The placenta develops from

Correct AnswerverifiedShow Answer

Cleavage in mammals

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In mammals,the organ of exchange between the mother and fetus is the

Correct AnswerverifiedShow Answer

In land vertebrates,the function of the chorion is to

Correct AnswerverifiedShow Answer

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Correct Answer
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Correct Answer
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Germ cells and germ layers are two disti...
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Cytoplasmic specification is the process...
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The type of cleavage and the origin of t...
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The derivatives of the three primary ger...
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Correct Answer
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Correct Answer
Answered by ExamLex AI
The amniotic egg is a significant develo...
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Correct Answer
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Correct Answer
verified

Animals having radial cleavage (echinoderms)also show a type of development,called __ _,in which separated blastomeres can develop into complete and normal organisms.

Correct Answer
verified
regulative...
View Answer

Correct Answer
Answered by ExamLex AI
Mosaic development and regulative develo...
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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