Question 1

The presence of the same homeotic genes in a wide range of organisms indicates that

Accepted Answer

A)  these genes evolved early in the history of life. 
B)  all organisms are composed of exactly the same proteins. 
C)  the same homeotic mutations are likely to appear in all organisms. 
D)  essentially we can complete the genome mapping of all animals in a short time. 
E)  structures remain fairly constant, but regulation of animal development varies widely across the kingdom. 
A)  these genes evolved early in the history of life. 
B)  all organisms are composed of exactly the same proteins. 
C)  the same homeotic mutations are likely to appear in all organisms. 
D)  essentially we can complete the genome mapping of all animals in a short time. 
E)  structures remain fairly constant, but regulation of animal development varies widely across the kingdom. A

Question 2

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

Question 3

The ________ is a dorsal supporting rod present in the early embryonic development of the vertebrates.

Accepted Answer

A)  neural plate 
B)  neural tube 
C)  notochord 
D)  neurula 
E)  vertebral column 
A)  neural plate 
B)  neural tube 
C)  notochord 
D)  neurula 
E)  vertebral column C

Question 4

Which of the following develops from the germ layer called the endoderm?

Accepted Answer

A)  skin and nervous system 
B)  muscles and blood 
C)  gut and pancreas 
D)  nervous system and muscles 
E)  epithelial lining of the urinary bladder 
A)  skin and nervous system 
B)  muscles and blood 
C)  gut and pancreas 
D)  nervous system and muscles 
E)  epithelial lining of the urinary bladder

Question 5

The last tissue layer to be formed during gastrulation is the

Accepted Answer

A)  endoderm. 
B)  ectoderm. 
C)  mesoderm. 
D)  gastroderm. 
E)  epiderm. 
A)  endoderm. 
B)  ectoderm. 
C)  mesoderm. 
D)  gastroderm. 
E)  epiderm.

Question 6

The sac that surrounds the fetus and usually ruptures just before childbirth is the

Accepted Answer

A)  gastrula. 
B)  allantois. 
C)  yolk sac. 
D)  amnion. 
E)  archenteron. 
A)  gastrula. 
B)  allantois. 
C)  yolk sac. 
D)  amnion. 
E)  archenteron.

Question 7

Which association is mismatched?

Accepted Answer

A)  chorion-gas exchange 
B)  amnion-blood vessels 
C)  allantois-waste storage 
D)  yolk sac-food storage 
E)  yolk-nourishment 
A)  chorion-gas exchange 
B)  amnion-blood vessels 
C)  allantois-waste storage 
D)  yolk sac-food storage 
E)  yolk-nourishment

Question 8

From months 5 to 7, a fetus is covered in a fine down called

Accepted Answer

A)  chorion. 
B)  fuzz. 
C)  lanugo. 
D)  vernosa. 
E)  hairs. 
A)  chorion. 
B)  fuzz. 
C)  lanugo. 
D)  vernosa. 
E)  hairs.

Question 9

Which part of the blastocyst will develop into the human embryo?

Accepted Answer

A)  archenteron 
B)  blastopore 
C)  chorion 
D)  trophoblast 
E)  inner cell mass 
A)  archenteron 
B)  blastopore 
C)  chorion 
D)  trophoblast 
E)  inner cell mass

Question 10

A fertilized egg undergoes cell division without overall growth in the process called

Accepted Answer

A)  cleavage. 
B)  gastrulation. 
C)  differentiation. 
D)  morphogenesis. 
E)  embryology. 
A)  cleavage. 
B)  gastrulation. 
C)  differentiation. 
D)  morphogenesis. 
E)  embryology.

Question 11

The cardiovascular and urinary systems form from the ________ layer.

Accepted Answer

A)  endoderm 
B)  ectoderm 
C)  mesoderm 
D)  blastoderm 
E)  gastroderm 
A)  endoderm 
B)  ectoderm 
C)  mesoderm 
D)  blastoderm 
E)  gastroderm

Question 12

During which month can the fetal heartbeat be heard by a physician with a stethoscope for the first time?

Accepted Answer

A)  first 
B)  second 
C)  fourth 
D)  sixth 
E)  eighth 
A)  first 
B)  second 
C)  fourth 
D)  sixth 
E)  eighth

Question 13

Which of the following hormones causes the uterus to contract?

Accepted Answer

A)  oxytocin 
B)  estrogen 
C)  progesterone 
D)  testosterone 
E)  prolactin 
A)  oxytocin 
B)  estrogen 
C)  progesterone 
D)  testosterone 
E)  prolactin

Question 14

Which of these describes how the skin changes 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 the answer choices are changes seen in the skin with aging. 
A)  loss of elasticity 
B)  loss of adipose tissue 
C)  loss of sweat glands 
D)  loss of sebaceous (oil) glands 
E)  All of the answer choices are changes seen in the skin with aging.

Question 15

The placenta develops from

Accepted Answer

A)  fetal membranes only. 
B)  maternal tissue only. 
C)  both fetal and maternal tissue. 
D)  separate polar bodies that develop just the placental tissues. 
E)  from the yolk sac. 
A)  fetal membranes only. 
B)  maternal tissue only. 
C)  both fetal and maternal tissue. 
D)  separate polar bodies that develop just the placental tissues. 
E)  from the yolk sac.

Question 16

The process in which one embryonic tissue influences the development of another tissue by the use of signals called inducers is known as

Accepted Answer

A)  neurulation. 
B)  gastrulation. 
C)  induction. 
D)  cytoplasmic segregation. 
E)  homeotic pattern formation. 
A)  neurulation. 
B)  gastrulation. 
C)  induction. 
D)  cytoplasmic segregation. 
E)  homeotic pattern formation.

Question 17

Another term for programmed cell death is

Accepted Answer

A)  morphogenesis. 
B)  apoptosis. 
C)  pattern formation. 
D)  cellular differentiation. 
E)  mitosis. 
A)  morphogenesis. 
B)  apoptosis. 
C)  pattern formation. 
D)  cellular differentiation. 
E)  mitosis.

Question 18

Which system in a developing embryo is the first to become visually evident?

Accepted Answer

A)  reproductive 
B)  circulatory 
C)  excretory 
D)  respiratory 
E)  nervous 
A)  reproductive 
B)  circulatory 
C)  excretory 
D)  respiratory 
E)  nervous

Question 19

Which of the following serves as an insulator for the embryo?

Accepted Answer

A)  amniotic fluid 
B)  allantois 
C)  chorion 
D)  primitive streak 
E)  yolk sac 
A)  amniotic fluid 
B)  allantois 
C)  chorion 
D)  primitive streak 
E)  yolk sac

Question 20

Which of the following describes an event 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)  tissues and organs become arranged in the body 
E)  All of the answer choices describe events associated with development. 
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)  tissues and organs become arranged in the body 
E)  All of the answer choices describe events associated with development.

Exam 22: Development and Aging

The presence of the same homeotic genes in a wide range of organisms indicates that

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)

The ________ is a dorsal supporting rod present in the early embryonic development of the vertebrates.

Which of the following develops from the germ layer called the endoderm?

The last tissue layer to be formed during gastrulation is the

The sac that surrounds the fetus and usually ruptures just before childbirth is the

Which association is mismatched?

From months 5 to 7, a fetus is covered in a fine down called

Which part of the blastocyst will develop into the human embryo?

A fertilized egg undergoes cell division without overall growth in the process called

The cardiovascular and urinary systems form from the ________ layer.

During which month can the fetal heartbeat be heard by a physician with a stethoscope for the first time?

Which of the following hormones causes the uterus to contract?

Which of these describes how the skin changes with aging?

The placenta develops from

The process in which one embryonic tissue influences the development of another tissue by the use of signals called inducers is known as

Another term for programmed cell death is

Which system in a developing embryo is the first to become visually evident?

Which of the following serves as an insulator for the embryo?

Which of the following describes an event associated with development?

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Digestive System and Nutrition

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Chromosomal Basis of Inheritance

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Evolution of Life

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