Question 1

What event initiates development?

Accepted Answer

A)  fertilization
B)  cleavage
C)  gastrulation
D)  organogenesisE) A) and D)
F) None of the above

Question 2

The head of a sperm is capped with an organelle that contains glycoprotein-digesting enzymes.What is this organelle called?

Accepted Answer

A)  zona pellucida
B)  acrosome
C)  granulosa
D)  blastulaE) None of the above
F) A) and D)

Question 3

The placenta protects the developing fetus from harmful substances like alcohol or drugs.

Accepted Answer

A) True 
 B)False

Question 4

Egg activation by sperm entry is associated with a sudden increase in protein synthesis.What must be true of these proteins?

Accepted Answer

A)  They are histone proteins.
B)  They are small peptides.
C)  They are from maternal mRNAs.
D)  They are from paternal mRNAs.E) B) and C)
F) B) and D)

Question 5

What problem would result from disrupted development of the allantois in both birds and mammals?

Accepted Answer

A)  Inability to retain the fluid that surrounds the embryo
B)  Inability to form the placenta
C)  Problems with gas exchange
D)  Loss of nutritional storesE) B) and D)
F) B) and C)

Question 6

What stimulates milk production in mammary alveoli?

Accepted Answer

A)  oxytocin
B)  prolactin
C)  chorionic gonadotropin
D)  progesteroneE) None of the above
F) B) and C)

Question 7

Your research project involves sea cucumbers, a poorly-understood group of echinoderms.You are trying to determine whether they block polyspermy by changing membrane potential like sea urchins do.In the chart below, you have counted the number of embryos that complete normal development after fertilization in either normal or low-sodium artificial sea water (ASW) , for each of three sets of experiments.Looking over your data, what do you conclude? + that changes the membrane potential. B) Sea cucumbers appear not to block polyspermy the same way as sea urchins, which use an outflow of Na+ that changes the membrane potential. C) Sea cucumbers appear to block polyspermy the same way as sea urchins, via an influx of Na+ that changes the membrane potential. D) Sea cucumbers appear to block polyspermy the same way as sea urchins, via an outflow of Na+ that changes the membrane potential." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Sea cucumbers appear not to block polyspermy the same way as sea urchins, which use an influx of Na+ that changes the membrane potential.
B)  Sea cucumbers appear not to block polyspermy the same way as sea urchins, which use an outflow of Na+ that changes the membrane potential.
C)  Sea cucumbers appear to block polyspermy the same way as sea urchins, via an influx of Na+ that changes the membrane potential.
D)  Sea cucumbers appear to block polyspermy the same way as sea urchins, via an outflow of Na+ that changes the membrane potential.E) C) and D)
F) B) and D)

Question 8

What is the period of rapid cell division in which the embryo does not increase in overall size?

Accepted Answer

A)  syngamy
B)  cleavage
C)  neurulation
D)  meiosisE) All of the above
F) A) and B)

Question 9

In the famous Spemann-Mangold experiment, what detail was crucial to understanding the result?

Accepted Answer

A)  transplanting the new dorsal lip cells to the same dorsal lip location in the second embryo
B)  using genetically different donor and host frogs
C)  placing the dorsal lip cells deep inside the archenteron
D)  treating the dorsal lip cells with morphogens before transplanting themE) A) and C)
F) C) and D)

Question 10

In the diagram, which of the following is true?

Accepted Answer

A)  Both diagrams show developmental sequences occurring in the same animal.
B)  Both diagrams show blastulae.
C)  Diagram II shows gastrulation in a bird.
D)  Diagram I shows gastrulation in a frog.E) None of the above
F) B) and C)

Question 11

What factor has the strongest influence on the cleavage pattern of an embryo?

Accepted Answer

A)  viscosity of albumin
B)  amount of yolk
C)  maturity of cytoplasm
D)  oxygen in airE) A) and B)
F) A) and C)

Question 12

A couple conceives a child on January 1st.Which day falls within the period of somitogenesis?

Accepted Answer

A)  January 3rd
B)  January 7th
C)  January 17th
D)  January 31stE) None of the above
F) A) and D)

Question 13

Which of the following animals undergoes rotational cleavage?

Accepted Answer

A)  echinoderms
B)  annelids
C)  amphibians
D)  mammalsE) A) and B)
F) B) and D)

Question 14

In 1999, researchers found that they could create hybrid embryos between two species of sea urchin that had been separated for 10 million years.By treating eggs to remove the jelly coat, the sperm of the other species was able to fertilize.What step of the fertilization process is normally blocked, preventing hybridization between these species?

Accepted Answer

A)  Sperm penetration
B)  Membrane fusion
C)  Egg activation
D)  Nuclear fusionE) None of the above
F) A) and B)

Question 15

What is the term for segmented blocks of tissue that form on either side of the notochord and are added sequentially?

Accepted Answer

A)  blastopores
B)  gastropores
C)  somites
D)  amniotic cellsE) B) and C)
F) A) and C)

Exam 53: Animal Development

What is the period of rapid cell division in which the embryo does not increase in overall size?

Correct Answer
verified

Egg activation by sperm entry is associated with a sudden increase in protein synthesis.What must be true of these proteins?

Correct Answer
verified

What event initiates development?

Correct Answer
verified

Which of the following animals undergoes rotational cleavage?

Correct Answer
verified

What stimulates milk production in mammary alveoli?

Correct Answer
verified

What problem would result from disrupted development of the allantois in both birds and mammals?

Correct Answer
verified

In the famous Spemann-Mangold experiment, what detail was crucial to understanding the result?

Correct Answer
verified

The placenta protects the developing fetus from harmful substances like alcohol or drugs.

Correct Answer
verified

What is the term for segmented blocks of tissue that form on either side of the notochord and are added sequentially?

Correct Answer
verified

Correct Answer
verified

In the diagram, which of the following is true?

Correct Answer
verified

Correct Answer
verified

A couple conceives a child on January 1st.Which day falls within the period of somitogenesis?

Correct Answer
verified

The head of a sperm is capped with an organelle that contains glycoprotein-digesting enzymes.What is this organelle called?

Correct Answer
verified

What factor has the strongest influence on the cleavage pattern of an embryo?

Correct Answer
verified

Exam 53: Animal Development

What is the period of rapid cell division in which the embryo does not increase in overall size?

Correct AnswerverifiedShow Answer

Egg activation by sperm entry is associated with a sudden increase in protein synthesis.What must be true of these proteins?

Correct AnswerverifiedShow Answer

What event initiates development?

Correct AnswerverifiedShow Answer

Which of the following animals undergoes rotational cleavage?

Correct AnswerverifiedShow Answer

What stimulates milk production in mammary alveoli?

Correct AnswerverifiedShow Answer

What problem would result from disrupted development of the allantois in both birds and mammals?

Correct AnswerverifiedShow Answer

In the famous Spemann-Mangold experiment, what detail was crucial to understanding the result?

Correct AnswerverifiedShow Answer

The placenta protects the developing fetus from harmful substances like alcohol or drugs.

Correct AnswerverifiedShow Answer

What is the term for segmented blocks of tissue that form on either side of the notochord and are added sequentially?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the diagram, which of the following is true?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A couple conceives a child on January 1st.Which day falls within the period of somitogenesis?

Correct AnswerverifiedShow Answer

The head of a sperm is capped with an organelle that contains glycoprotein-digesting enzymes.What is this organelle called?

Correct AnswerverifiedShow Answer

What factor has the strongest influence on the cleavage pattern of an embryo?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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