Question 1

Indicate the proper order of events that occur in fertilization.

Accepted Answer

a. Sperm cover the surface of the egg an...

Question 2

Which of the following variables would support the damage accumulation theory of aging?

Accepted Answer

A)   Harmful metabolites accumulate over our lifetime.
B)   Protein fibers become cross-linked as we age.
C)   Poor diet and exposure to the sun lead to cellular damage.
D)   None of these support the damage accumulation theory of aging
E)   All of these support the damage accumulation theory of agingF) A) and D)
G) A) and C)

Question 3

When discussing the morphogenesis of Drosophila melanogaster, homeotic gene codes for

Accepted Answer

A)   proteins that bind to regulatory regions of DNA.
B)   proteins that determine anteroposterior polarity.
C)   proteins that determine which genes are turned on.
D)   proteins that bind to regulatory regions of DNA and proteins that determine which genes are turned on.
E)   All of the choices are correct.F) B) and E)
G) B) and D)

Question 4

What is the correct order of steps of morphogenesis in Drosophila melanogaster?
A. Gap genes divide the body into broad regions
B. Establishment of anterior / posterior axes
C. Homeotic genes determine which body parts arise from each region
D. Pair-rule genes are activated in order to develop a preliminary segmentation pattern

Accepted Answer

A)   b - a - d - c
B)   a - d - c - b
C)   b - a - c - d
D)   a - b - c - d
E)   a - d - b - cF) A) and E)
G) All of the above

Question 5

The process in which neighboring cells influence the development of each other, either by direct contact or by production of chemical signals, is

Accepted Answer

A)   neurulation.
B)   gastrulation.
C)   induction.
D)   maternal determinants.
E)   homeotic pattern formation.F) B) and C)
G) C) and D)

Question 6

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 E)
G) B) and D)

Question 7

During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a

Accepted Answer

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

Question 8

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

Accepted Answer

A. neural tube: The neural tube is forme...

Question 9

Development of the human embryo's heart begins in the ____ week.

Accepted Answer

A)   16th
B)   3rd
C)   1st
D)   24th
E)   6thF) B) and E)
G) C) and D)

Question 10

If the acrosome cap of the sperm were to fall off what would happen during fertilization?

Accepted Answer

A)   The corona radiata would not be weakened by the enzymes found in the acrosome cap of the sperm.
B)   The corona radiata would not be weakened by the fatty acids found in the acrosome cap of the sperm.
C)   The zona pellucida would depolarize at a faster rate than if the acrosome cap was present.
D)   None of the answer choices would occur.
E)   All of the answer choices would occur.F) D) and E)
G) C) and D)

Question 11

Which association of structure and function is incorrect?

Accepted Answer

A)   chorion - gas exchange
B)   amnion - blood vessels
C)   allantois - waste storage
D)   yolk sac - food storageE) A) and B)
F) A) and D)

Question 12

Using the word bank below, identify the labeled structures in the picture (embryo, amnion, yolk sac, allantois, chorion, umbilical cord).

Accepted Answer

A: chorion
B: amnion...

Question 13

Which of the following statements about embryonic development is NOT true?

Accepted Answer

A)   A blastopore is the opening into the primitive gut formed by gastrulation.
B)   A blastocoel is the fluid-filled cavity of a blastula.
C)   A primitive gut is also referred to as an archenteron.
D)   The primitive streak occurs in the morula stage of the embryonic development.
E)   A zygote undergoes cleavage, which increases the cell number, but not the volume of the egg cytoplasm.F) All of the above
G) A) and E)

Question 14

In what process does a fertilized egg undergo cell division without further growth?

Accepted Answer

A)   cleavage
B)   gastrulation
C)   differentiation
D)   morphogenesis
E)   implantationF) A) and E)
G) A) and D)

Question 15

Which of the following serves as the first site of blood formation in the embryo?

Accepted Answer

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

Question 16

Which of the following is the organ of exchange between the mother and fetus?

Accepted Answer

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

Question 17

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) A) and B)
G) None of the above

Question 18

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 19

Which health issue is related to aging issues associated with the immune system?

Accepted Answer

A)   An elderly patient does not respond well to vaccinations.
B)   The thymus increases in size due to an accumulation of adipose tissue.
C)   The number of natural killer T cells declines.
D)   All of the choices are correct.
E)   None of the choices are correct.F) A) and E)
G) A) and D)

Question 20

The preprogrammed theory of aging supports all of the following except

Accepted Answer

A)   there is a genetic influence on aging.
B)   mutations that decrease the activity of a hormone receptor contribute to a longer lifespan.
C)   the accumulation of harmful DNA mutants builds up over time.
D)   longevity tends to run in families.
E)   identical twins have a similar life span.F) None of the above
G) B) and C)

Exam 42: Animal Development

The _____ develops into the fetal portion of the placenta.

Correct Answer
verified

Using the word bank below, identify the labeled structures in the picture (embryo, amnion, yolk sac, allantois, chorion, umbilical cord).

Correct Answer
verified
A: chorion
B: amnion...
View Answer

Which association of structure and function is incorrect?

Correct Answer
verified

Which of the following statements about embryonic development is NOT true?

Correct Answer
verified

Which health issue is related to aging issues associated with the immune system?

Correct Answer
verified

The preprogrammed theory of aging supports all of the following except

Correct Answer
verified

Which of the following serves as the first site of blood formation in the embryo?

Correct Answer
verified

Which of the following is the organ of exchange between the mother and fetus?

Correct Answer
verified

In what process does a fertilized egg undergo cell division without further growth?

Correct Answer
verified

Correct Answer
verified

Which of the following variables would support the damage accumulation theory of aging?

Correct Answer
verified

During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a

Correct Answer
verified

Correct Answer
verified

Indicate the proper order of events that occur in fertilization.

Correct Answer
verified
a. Sperm cover the surface of the egg an...
View Answer

The process in which neighboring cells influence the development of each other, either by direct contact or by production of chemical signals, is

Correct Answer
verified

Development of the human embryo's heart begins in the ____ week.

Correct Answer
verified

Correct Answer
verified

If the acrosome cap of the sperm were to fall off what would happen during fertilization?

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 forme...
View Answer

When discussing the morphogenesis of Drosophila melanogaster, homeotic gene codes for

Correct Answer
verified

Exam 42: Animal Development

The _____ develops into the fetal portion of the placenta.

Correct AnswerverifiedShow Answer

Using the word bank below, identify the labeled structures in the picture (embryo, amnion, yolk sac, allantois, chorion, umbilical cord).

Correct AnswerverifiedA: chorionB: amnion...View AnswerShow Answer

Which association of structure and function is incorrect?

Correct AnswerverifiedShow Answer

Which of the following statements about embryonic development is NOT true?

Correct AnswerverifiedShow Answer

Which health issue is related to aging issues associated with the immune system?

Correct AnswerverifiedShow Answer

The preprogrammed theory of aging supports all of the following except

Correct AnswerverifiedShow Answer

Which of the following serves as the first site of blood formation in the embryo?

Correct AnswerverifiedShow Answer

Which of the following is the organ of exchange between the mother and fetus?

Correct AnswerverifiedShow Answer

In what process does a fertilized egg undergo cell division without further growth?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following variables would support the damage accumulation theory of aging?

Correct AnswerverifiedShow Answer

During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Indicate the proper order of events that occur in fertilization.

Correct Answerverifieda. Sperm cover the surface of the egg an...View AnswerShow Answer

The process in which neighboring cells influence the development of each other, either by direct contact or by production of chemical signals, is

Correct AnswerverifiedShow Answer

Development of the human embryo's heart begins in the ____ week.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If the acrosome cap of the sperm were to fall off what would happen during fertilization?

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 forme...View AnswerShow Answer

When discussing the morphogenesis of Drosophila melanogaster, homeotic gene codes for

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
A: chorion
B: amnion...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a. Sperm cover the surface of the egg an...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified