Question 1

A healthy fetus born at twenty-four weeks has a chance of surviving,although it may have

Accepted Answer

A)  immature lungs and breathing difficulties.
B)  kidneys that fail to function.
C)  an incomplete digestive system.
D)  problems with brain development.
E)  an incomplete heart and circulatory system.F) A) and D)
G) A) and B)

Question 2

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) B) and D)
F) A) and D)

Question 3

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 4

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

Question 5

Prevention of polyspermy depends upon changes in the plasma membrane of the egg and in the zona pellucida.

Accepted Answer

A) True 
 B)False

Question 6

Identify and briefly describe the labeled stages and structures in this diagram of embryonic development.Specify where cleavage and gastrulation are occurring.

Accepted Answer

A.Cleavage is occurring during this time...

Question 7

A series of events occur during fertilization.Place the following events in the proper order in which they occur.
a.The "slowblock" occurs.
b.A single nuclear envelope surrounds both sperm and egg pronuclei.
c.The acrosomes of sperm release digestive enzymes that allow the sperm to pass through the zona pellucida to the egg plasma membrane.
d.Sperm cover the surface of the egg and secrete enzymes that help weaken the corona radiata.
e.Pronuclei are formed.
f.The "fast block" occurs.
g.Microvilli bring the entire sperm into the egg.
h.Sperm squeeze through the corona radiata and bind to the zona pellucida.

Accepted Answer

A)  a,e,b,d,f,c,g,h
B)  d,h,c,f,a,g,e,b
C)  d,b,g,a,f,c,e,h
D)  f,a,d,h,c,g,e,b
E)  e,d,h,c,a,f,b,gF) A) and B)
G) A) and C)

Question 8

What body systems may be impacted if a mother drinks alcohol during pregnancy and causes developmental problems to the endoderm?

Accepted Answer

A)  The epithelial lining of the digestive and respiratory systems may not be as functional as they should be.
B)  The epithelial lining of the digestive and reproductive systems may not be as functional as they should be.
C)  The epidermis and the epithelial lining of the oral cavity may not be as functional as they should.
D)  The outer layers of the digestive and respiratory systems may not be as functional as they should.E) B) and D)
F) None of the above

Question 9

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) A) and B)
G) A) and E)

Question 10

Differentiation is characterized by

Accepted Answer

A)  cellular division and growth.
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) A) and D)
G) B) and E)

Question 11

What statement about homeotic genes,as it relates to morphogenesis in Drosophila,is NOT true?

Accepted Answer

A)  Homeotic genes are found in many different organisms.
B)  Homeotic genes code for translational factors that bind to mRNA.
C)  Each homeotic gene has a variable region and a sequence called the homeobox.
D)  The homeobox codes for a homeodomain which is the DNA-binding portion of the transcriptional factor.
E)  All homeotic genes are thought to be derived from an original DNA sequence that has been highly conserved in evolution.F) A) and D)
G) A) and E)

Question 12

The trophoblast will provide nourishment for the embryo and give rise to the placenta.

Accepted Answer

A) True 
 B)False

Question 13

Which structures located on the oocyte serve to bring the entire sperm into it?

Accepted Answer

A)  microvilli
B)  flagella
C)  zona pellucida
D)  corona radiataE) A) and D)
F) None of the above

Exam 42: Animal Development and Aging

Correct Answer
verified

Identify and briefly describe the labeled stages and structures in this diagram of embryonic development.Specify where cleavage and gastrulation are occurring.

Correct Answer
verified
A.Cleavage is occurring during this time...
View Answer

What body systems may be impacted if a mother drinks alcohol during pregnancy and causes developmental problems to the endoderm?

Correct Answer
verified

Which structures located on the oocyte serve to bring the entire sperm into it?

Correct Answer
verified

What statement about homeotic genes,as it relates to morphogenesis in Drosophila,is NOT true?

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

Prevention of polyspermy depends upon changes in the plasma membrane of the egg and in the zona pellucida.

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

Differentiation is characterized by

Correct Answer
verified

The trophoblast will provide nourishment for the embryo and give rise to the placenta.

Correct Answer
verified

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

Correct Answer
verified

A healthy fetus born at twenty-four weeks has a chance of surviving,although it may have

Correct Answer
verified

Exam 42: Animal Development and Aging

Correct AnswerverifiedShow Answer

Identify and briefly describe the labeled stages and structures in this diagram of embryonic development.Specify where cleavage and gastrulation are occurring.

Correct AnswerverifiedA.Cleavage is occurring during this time...View AnswerShow Answer

What body systems may be impacted if a mother drinks alcohol during pregnancy and causes developmental problems to the endoderm?

Correct AnswerverifiedShow Answer

Which structures located on the oocyte serve to bring the entire sperm into it?

Correct AnswerverifiedShow Answer

What statement about homeotic genes,as it relates to morphogenesis in Drosophila,is NOT true?

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: chorion B: amnion...View AnswerShow Answer

Which association of structure and function is incorrect?

Correct AnswerverifiedShow Answer

Prevention of polyspermy depends upon changes in the plasma membrane of the egg and in the zona pellucida.

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

Differentiation is characterized by

Correct AnswerverifiedShow Answer

The trophoblast will provide nourishment for the embryo and give rise to the placenta.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A healthy fetus born at twenty-four weeks has a chance of surviving,although it may have

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
A.Cleavage is occurring during this time...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified