Question 1

Which of these is not associated with development?

Accepted Answer

A)   Cells divide and get larger.
B)   Cells become specialized in structure and function.
C)   Body parts are shaped and patterned into a specific form.
D)   One cell eventually becomes four sperm.
E)   Tissues and organs become arranged in the body.F) A) and B)
G) A) and D)

Question 2

During the formation of an embryo,a solid ball of cells with a fluid-filled cavity inside is termed a

Accepted Answer

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

Question 3

In human development,the ______ is the site of early blood cell formation for the fetus.

Accepted Answer

A)   umbilical cord
B)   placenta
C)   amniotic fluid
D)   yolk sac
E)   allantoisF) A) and C)
G) All of the above

Question 4

What role does the acrosome play in fertilization?

Accepted Answer

A)   it contains enzymes that digest a pathway for the sperm through the zona pellucida
B)   it contains lipids that digest a pathway for the sperm through the zona pellucida
C)   it contains enzymes that digest a pathway for the sperm through the corona radiata
D)   it contains lipids that digest a pathway for the sperm through the corona radiata
E)   it causes the zona pellucida to become the fertilization membraneF) C) and E)
G) C) and D)

Question 5

Which statement is NOT true regarding aging?

Accepted Answer

A)   A genetic factor is indicated when children of long-lived parents live a long time.
B)   Different body processes wear out.
C)   Lack of calcium in a person's diet may lead to bone loss.
D)   The immune system increases in activity.
E)   Some proteins become crosslinked.F) C) and E)
G) A) and B)

Question 6

Which of the following is NOT correct?

Accepted Answer

A)   Embryonic cells are totipotent.
B)   Differentiation is due to parceling out of genes into various embryonic cells.
C)   The contents of the cytoplasm of an egg are not distributed uniformly.
D)   If an egg from a frog divides without receiving the gray crescent, it will not become a tadpole.
E)   Differentiation is influenced by chemical signals given off by neighboring cells.F) A) and E)
G) A) and B)

Question 7

Which statement is NOT true about homeotic genes?

Accepted Answer

A)   Each homeotic gene has a variable region and a sequence called the homeobox that is very similar in all such genes.
B)   They have been found in almost all eukaryotic organisms.
C)   They are master genes that control all other genes in the organism.
D)   They are sequentially arranged on the chromosome in the same sequence they are activated during development of the embryo in Drosophila.
E)   All homeotic genes are thought to be derived from an original DNA sequence that has been highly conserved in evolution because of its importance to animal evolution.F) A) and B)
G) All of the above

Question 8

The _______ provides nourishment for the embryo during chick development.

Accepted Answer

A)   umbilical cord
B)   allantois
C)   yolk sac
D)   embryo
E)   choroinF) A) and B)
G) B) and C)

Question 9

Which of these is not a change in the skin that occurs with aging?

Accepted Answer

A)   loss of elasticity
B)   loss of adipose tissue
C)   loss of sweat glands
D)   loss of sebaceous (oil)  glands
E)   all of these are changes seen in the skin with agingF) A) and E)
G) C) and E)

Question 10

Which of the following would NOT provide evidence for a genetic basis for aging?

Accepted Answer

A)   Children of short-lived parents live shorter lives than children of long-lived parents.
B)   Cells only divide for a set number of divisions.
C)   Cell lines become nonfunctional before their maximum number of divisions is reached.
D)   Smoking and excessive alcohol intake are linked to shorter life spans.
E)   Certain genes that code for antioxidant enzymes to detoxify free radicals are present in animals that live longer.F) A) and B)
G) C) and E)

Question 11

Implantation occurs during the

Accepted Answer

A)   fertilization.
B)   first week.
C)   second week.
D)   second month.
E)   fourth month.F) None of the above
G) All of the above

Question 12

As women age they are less likely to suffer from a heart attack,this is thought to be true because

Accepted Answer

A)   women have less stressful lives than men
B)   men have testosterone and women do not
C)   women have estrogen and men do not
D)   women tend to take better care of their health
E)   women have a genetic resistance that prevents them from having heart attacksF) None of the above
G) C) and D)

Question 13

Researchers have observed that in villages in Russian Georgia where people have a low calorie diet but are not malnourished,the average life expectancy is longer.Less food intake would result in fewer free radicals from metabolism,compared to societies where individuals ate more than they required.The text explains that genes for antioxidant enzymes that destroy free radicals would be inherited.How could we test,in a practical manner,whether this longevity was genetic or a matter of chosen diet?

Accepted Answer

A)   Continue keeping records of villagers versus a control population with a normal diet until the numbers are statistically significant.
B)   Track the fate of villagers who move away to more affluent communities where people eat a better diet, or supplement the diet of a portion of the villagers over time.
C)   Conduct test-crosses to determine the lifespan of F1 and F2 generations.
D)   Examine a cell sample for developmental or homeotic genes.
E)   Take DNA samples from people and test for similarity of genes.F) A) and D)
G) C) and D)

Question 14

The sex of the fetus can be first determined in the ______ month of development.

Accepted Answer

A)   first
B)   second
C)   third or fourth
D)   six or seventh
E)   eighth or ninthF) None of the above
G) A) and E)

Question 15

Which of the following develop from the germ layer called the ectoderm?

Accepted Answer

A)   skin and nervous system
B)   muscles and blood
C)   gut and pancreas
D)   nervous system and muscles
E)   reproductive and urinaryF) A) and C)
G) All of the above

Question 16

List and describe the major events during the 3 stages of birth.

Accepted Answer

Stage 1: The cervical canal disappears a...

Exam 22: Development and Aging

The sex of the fetus can be first determined in the ______ month of development.

Correct Answer
verified

Which of the following is NOT correct?

Correct Answer
verified

As women age they are less likely to suffer from a heart attack,this is thought to be true because

Correct Answer
verified

Which statement is NOT true about homeotic genes?

Correct Answer
verified

In human development,the ______ is the site of early blood cell formation for the fetus.

Correct Answer
verified

During the formation of an embryo,a solid ball of cells with a fluid-filled cavity inside is termed a

Correct Answer
verified

Which statement is NOT true regarding aging?

Correct Answer
verified

List and describe the major events during the 3 stages of birth.

Correct Answer
verified
Stage 1: The cervical canal disappears a...
View Answer

Which of the following develop from the germ layer called the ectoderm?

Correct Answer
verified

Correct Answer
verified

The _______ provides nourishment for the embryo during chick development.

Correct Answer
verified

Which of these is not associated with development?

Correct Answer
verified

Which of the following would NOT provide evidence for a genetic basis for aging?

Correct Answer
verified

Implantation occurs during the

Correct Answer
verified

Which of these is not a change in the skin that occurs with aging?

Correct Answer
verified

What role does the acrosome play in fertilization?

Correct Answer
verified

Exam 22: Development and Aging

The sex of the fetus can be first determined in the ______ month of development.

Correct AnswerverifiedShow Answer

Which of the following is NOT correct?

Correct AnswerverifiedShow Answer

As women age they are less likely to suffer from a heart attack,this is thought to be true because

Correct AnswerverifiedShow Answer

Which statement is NOT true about homeotic genes?

Correct AnswerverifiedShow Answer

In human development,the ______ is the site of early blood cell formation for the fetus.

Correct AnswerverifiedShow Answer

During the formation of an embryo,a solid ball of cells with a fluid-filled cavity inside is termed a

Correct AnswerverifiedShow Answer

Which statement is NOT true regarding aging?

Correct AnswerverifiedShow Answer

List and describe the major events during the 3 stages of birth.

Correct AnswerverifiedStage 1: The cervical canal disappears a...View AnswerShow Answer

Which of the following develop from the germ layer called the ectoderm?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The _______ provides nourishment for the embryo during chick development.

Correct AnswerverifiedShow Answer

Which of these is not associated with development?

Correct AnswerverifiedShow Answer

Which of the following would NOT provide evidence for a genetic basis for aging?

Correct AnswerverifiedShow Answer

Implantation occurs during the

Correct AnswerverifiedShow Answer

Which of these is not a change in the skin that occurs with aging?

Correct AnswerverifiedShow Answer

What role does the acrosome play in fertilization?

Correct AnswerverifiedShow Answer

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
verified
Stage 1: The cervical canal disappears a...
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
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