Question 1

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 B)
G) C) and D)

Question 2

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) All of the above
G) C) and E)

Question 3

In order to provide for easier birth,a newborn baby has membranous areas of skull called

Accepted Answer

A)  oval windows.
B)  bursa.
C)  sutures.
D)  septa.
E)  fontanels.F) B) and E)
G) A) and B)

Question 4

The ______ in fetal circulation allows blood from the right atrium to directly enter the left atrium.

Accepted Answer

A)  umbilical cord
B)  arterial duct
C)  foramen ovale
D)  venous duct
E)  right ventricleF) None of the above
G) C) and D)

Question 5

During gastrulation in vertebrates,the pore created by invagination will become the

Accepted Answer

A)  brain.
B)  heart.
C)  mouth.
D)  anus.
E)  ear.F) A) and B)
G) B) and E)

Question 6

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

Question 7

The afterbirth refers to the

Accepted Answer

A)  expulsion of the placenta and membranes.
B)  expulsion of the uterine lining.
C)  expulsion of the amniotic membrane.
D)  expulsion of the fetus.
E)  period of time from birth to nursing.F) B) and D)
G) A) and E)

Question 8

Generally only one sperm fertilizes an egg because

Accepted Answer

A)  sperm compete against one another before entering and only the most fit one is accepted.
B)  sperm are so few that two are unlikely to arrive at the same time.
C)  one small entry hole called the blastopore allows only one sperm to fit through and then seals.
D)  many sperm enter but only one set of chromosomes can fuse with the egg nucleus; the other sperm are absorbed.
E)  when the first sperm fuses with the egg membrane,it causes the membrane to depolarize and also separates the fertilization membrane and this gap forms a barrier to any other sperm.F) A) and D)
G) A) and C)

Question 9

In experiments with the roundworm Caenorhabditis elegans,researchers were able to trace the development of the generalized zygote into the specialized cells of the adult roundworm,a schematic that formed a(n)

Accepted Answer

A)  homeobox.
B)  pattern formation.
C)  cytoplasmic segregation.
D)  induction.
E)  fate map.F) C) and D)
G) C) and E)

Question 10

The blastocoel is formed during the _____ stage of development.

Accepted Answer

A)  morula
B)  blastula
C)  gastrula
D)  zygote
E)  neurulaF) C) and D)
G) B) and E)

Question 11

After milk production begins,it continues as long as the baby suckles,but ends otherwise.This maintenance is provided by nervous stimulation sent to the ____,which eventually causes production of ____.

Accepted Answer

A)  ovaries; prolactin
B)  pituitary; prolactin
C)  hypothalamus; oxytocin
D)  ovaries; oxytocin
E)  uterus; estrogenF) All of the above
G) A) and C)

Question 12

The _______ provides nourishment for the embryo during chick development.

Accepted Answer

A)  umbilical cord
B)  allantois
C)  yolk sac
D)  embryo
E)  chorionF) None of the above
G) A) and D)

Question 13

The human blastocyst

Accepted Answer

A)  gives rise to umbilical blood vessels.
B)  contains a fluid-filled central cavity.
C)  is the expanded end of the gastrula.
D)  has three germ layers.
E)  is the fertilized egg.F) A) and C)
G) A) and B)

Question 14

Which of the following is an advantage of breast-feeding?

Accepted Answer

A)  All of the answer choices are advantages of breast-feeding.
B)  Colostrum is rich in proteins and antibodies.
C)  physiological benefits for the mother
D)  Suckling causes uterine contractions that help reduce the uterus to its normal size.
E)  Breast-feeding uses up calories that can help a woman return to her normal weight.F) A) and B)
G) A) and C)

Question 15

The _____ is responsible for gas exchange in the egg of a chicken.

Accepted Answer

A)  yolk sac
B)  amnion
C)  embryo
D)  umbilical cord
E)  chorionF) A) and E)
G) B) and D)

Question 16

How does a sperm penetrate an egg?

Accepted Answer

A)  Enzymes in the acrosome dissolve the zona pellucida.
B)  The sperm melts its way inside,using the nucleic acids in its DNA.
C)  The forward pressure of the flagellum forces it through the plasma membrane.
D)  Spermatids are wedge-shaped and are chemically attracted to the inside cytoplasm of the egg cell.
E)  The haploid sets of chromosomes match across the membrane and this triggers the membrane to dissolve.F) A) and C)
G) A) and B)

Exam 22: Development and Aging

During gastrulation in vertebrates,the pore created by invagination will become the

Correct Answer
verified

Which of these is not associated with development?

Correct Answer
verified

How does a sperm penetrate an egg?

Correct Answer
verified

Generally only one sperm fertilizes an egg because

Correct Answer
verified

In experiments with the roundworm Caenorhabditis elegans,researchers were able to trace the development of the generalized zygote into the specialized cells of the adult roundworm,a schematic that formed a(n)

Correct Answer
verified

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

Correct Answer
verified

The _____ is responsible for gas exchange in the egg of a chicken.

Correct Answer
verified

The afterbirth refers to the

Correct Answer
verified

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

Correct Answer
verified

The ______ in fetal circulation allows blood from the right atrium to directly enter the left atrium.

Correct Answer
verified

Which of the following is an advantage of breast-feeding?

Correct Answer
verified

The human blastocyst

Correct Answer
verified

After milk production begins,it continues as long as the baby suckles,but ends otherwise.This maintenance is provided by nervous stimulation sent to the ,which eventually causes production of .

Correct Answer
verified

The _______ provides nourishment for the embryo during chick development.

Correct Answer
verified

The blastocoel is formed during the _____ stage of development.

Correct Answer
verified

In order to provide for easier birth,a newborn baby has membranous areas of skull called

Correct Answer
verified

Exam 22: Development and Aging

During gastrulation in vertebrates,the pore created by invagination will become the

Correct AnswerverifiedShow Answer

Which of these is not associated with development?

Correct AnswerverifiedShow Answer

How does a sperm penetrate an egg?

Correct AnswerverifiedShow Answer

Generally only one sperm fertilizes an egg because

Correct AnswerverifiedShow Answer

In experiments with the roundworm Caenorhabditis elegans,researchers were able to trace the development of the generalized zygote into the specialized cells of the adult roundworm,a schematic that formed a(n)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The _____ is responsible for gas exchange in the egg of a chicken.

Correct AnswerverifiedShow Answer

The afterbirth refers to the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The ______ in fetal circulation allows blood from the right atrium to directly enter the left atrium.

Correct AnswerverifiedShow Answer

Which of the following is an advantage of breast-feeding?

Correct AnswerverifiedShow Answer

The human blastocyst

Correct AnswerverifiedShow Answer

After milk production begins,it continues as long as the baby suckles,but ends otherwise.This maintenance is provided by nervous stimulation sent to the ____,which eventually causes production of ____.

Correct AnswerverifiedShow Answer

The _______ provides nourishment for the embryo during chick development.

Correct AnswerverifiedShow Answer

The blastocoel is formed during the _____ stage of development.

Correct AnswerverifiedShow Answer

In order to provide for easier birth,a newborn baby has membranous areas of skull called

Correct AnswerverifiedShow Answer

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Correct Answer
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verified

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verified

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verified

After milk production begins,it continues as long as the baby suckles,but ends otherwise.This maintenance is provided by nervous stimulation sent to the ,which eventually causes production of .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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