Question 1

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. 
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. B

Question 2

Which of the following stages of embryonic development consists of only two layers of cells?

Accepted Answer

A) morula 
B) blastula 
C) early gastrula 
D) late gastrula 
A) morula 
B) blastula 
C) early gastrula 
D) late gastrula C

Question 3

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

Accepted Answer

A) True 
 B)False  True

Question 4

The notochord develops in which stage of embryonic development?

Accepted Answer

A) gastrulation 
B) neurulation 
C) blastulation 
D) cleavage 
A) gastrulation 
B) neurulation 
C) blastulation 
D) cleavage

Question 5

Which structure is not associated with the development of the central nervous system in vertebrates?

Accepted Answer

A) notochord 
B) neural plate 
C) neural tube 
D) ectoderm 
A) notochord 
B) neural plate 
C) neural tube 
D) ectoderm

Question 6

The neural tube of vertebrates develops during morphogenesis of the nervous system by the

Accepted Answer

A) folding of ectoderm tissue. 
B) migration of mesoderm cells. 
C) fusion of ectoderm and mesoderm. 
D) contraction of the endoderm away from the mesoderm. 
E) extension of endoderm into a thin spinal column. 
A) folding of ectoderm tissue. 
B) migration of mesoderm cells. 
C) fusion of ectoderm and mesoderm. 
D) contraction of the endoderm away from the mesoderm. 
E) extension of endoderm into a thin spinal column.

Question 7

At _____ weeks,the fetal heartbeat can be heard through a stethoscope.

Accepted Answer

A) 4 
B) 25 
C) 16 
D) 12 
E) 30 
A) 4 
B) 25 
C) 16 
D) 12 
E) 30

Question 8

What is the correct order of steps of morphogenesis in Drosophila melanogaster. A.Gap genes divide the body into broad regions
B.Establishment of anterior / posterior axes
C.Homeotic genes determine which body parts arise from each region
D.Pair-rule genes are activated in order to develop a preliminary segmentation pattern

Accepted Answer

A) b - a - d - c 
B) a - d - c - b 
C) b - a - c - d 
D) a - b - c - d 
E) a - d - b - c 
A) b - a - d - c 
B) a - d - c - b 
C) b - a - c - d 
D) a - b - c - d 
E) a - d - b - c

Question 9

The coelomic cavity is derived from the

Accepted Answer

A) blastocoel. 
B) folding of the neural tube. 
C) splitting of the mesoderm. 
D) elimination of the yolk sac nutrients. 
E) space left after organs develop. 
A) blastocoel. 
B) folding of the neural tube. 
C) splitting of the mesoderm. 
D) elimination of the yolk sac nutrients. 
E) space left after organs develop.

Question 10

Morphogenesis is characterized by

Accepted Answer

A) cell division and growth in size. 
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. 
A) cell division and growth in size. 
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.

Question 11

Which of the following variables would support the damage accumulation theory of aging?

Accepted Answer

A) Harmful metabolites accumulate over our lifetime. 
B) Protein fibers become cross-linked as we age. 
C) Poor diet and exposure to the sun lead to cellular damage. 
D) None of these support the damage accumulation theory of aging 
E) All of these support the damage accumulation theory of aging 
A) Harmful metabolites accumulate over our lifetime. 
B) Protein fibers become cross-linked as we age. 
C) Poor diet and exposure to the sun lead to cellular damage. 
D) None of these support the damage accumulation theory of aging 
E) All of these support the damage accumulation theory of aging

Question 12

By the end of the eighth week of development,all organ systems are developed in the embryo.

Accepted Answer

A) True 
 B)False

Question 13

Identify the correct order of steps in the development of the central nervous system. 
A.Neural folds develop on either side of the neural groove.
B.The neural tube forms.
C.Thickening of cells on the dorsal surface called the neural plate occurs.
D.The anterior end of the neural tube develops into the brain.

Accepted Answer

A) c - a - b - d 
B) c - a - d - b 
C) a - c - b - d 
D) a - b - c- d 
E) d - c - b - a 
A) c - a - b - d 
B) c - a - d - b 
C) a - c - b - d 
D) a - b - c- d 
E) d - c - b - a

Question 14

The human embryo becomes a fetus at the end of the second month of gestation.

Accepted Answer

A) True 
 B)False

Question 15

Development of the human embryo's heart begins in the ____ week.

Accepted Answer

A) 16th 
B) 3rd 
C) 1st 
D) 24th 
E) 6th 
A) 16th 
B) 3rd 
C) 1st 
D) 24th 
E) 6th

Question 16

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

Question 17

Which of the following structures is NOT one of the extraembryonic membranes associated with the human embryo?

Accepted Answer

A) chorion 
B) amnion 
C) placenta 
D) yolk sac 
E) allantois 
A) chorion 
B) amnion 
C) placenta 
D) yolk sac 
E) allantois

Question 18

Which of the following serves as the first site of blood formation in the embryo?

Accepted Answer

A) chorion 
B) amnion 
C) placenta 
D) yolk sac 
E) allantois. 
A) chorion 
B) amnion 
C) placenta 
D) yolk sac 
E) allantois.

Question 19

A 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. 
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.

Question 20

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 radiata 
A) microvilli 
B) flagella 
C) zona pellucida 
D) corona radiata

Exam 42: Animal Development

Differentiation is characterized by

Which of the following stages of embryonic development consists of only two layers of cells?

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

The notochord develops in which stage of embryonic development?

Which structure is not associated with the development of the central nervous system in vertebrates?

The neural tube of vertebrates develops during morphogenesis of the nervous system by the

At _____ weeks,the fetal heartbeat can be heard through a stethoscope.

The coelomic cavity is derived from the

Morphogenesis is characterized by

Which of the following variables would support the damage accumulation theory of aging?

By the end of the eighth week of development,all organ systems are developed in the embryo.

The human embryo becomes a fetus at the end of the second month of gestation.

Development of the human embryo's heart begins in the ____ week.

Which association of structure and function is incorrect?

Which of the following structures is NOT one of the extraembryonic membranes associated with the human embryo?

Which of the following serves as the first site of blood formation in the embryo?

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

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

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

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