Question 1

What statement about homeotic genes,as it relates to morphogenesis inDrosophila ,is NOT true?

Accepted Answer

A) Homeotic genes are found in many different organisms. 
B) Homeotic genes code for translational factors that bind to mRNA. 
C) Each homeotic gene has a variable region and a sequence called the homeobox. 
D) The homeobox codes for a homeodomain which is the DNA-binding portion of the transcriptional factor. 
E) All homeotic genes are thought to be derived from an original DNA sequence that has been highly conserved in evolution. 
A) Homeotic genes are found in many different organisms. 
B) Homeotic genes code for translational factors that bind to mRNA. 
C) Each homeotic gene has a variable region and a sequence called the homeobox. 
D) The homeobox codes for a homeodomain which is the DNA-binding portion of the transcriptional factor. 
E) All homeotic genes are thought to be derived from an original DNA sequence that has been highly conserved in evolution.

Question 2

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

Accepted Answer

A) True 
 B)False

Question 3

What is the correct series of events during parturition? 
A.The amnion breaks.
B.The cervix dilates.
C.ACTH causes the adrenal cortex to release androgens into the bloodstream.
D.Prostaglandins and oxytocin are produced.
E.The baby is born and the umbilical cord is cut.
F.The placenta is delivered.

Accepted Answer

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

Question 4

The proper order of embryonic development is

Accepted Answer

A) cleavage-morula-blastula-gastrula. 
B) morula-cleavage-blastula-gastrula. 
C) blastula-cleavage-morula-gastrula. 
D) gastrula-cleavage-blastula-morula. 
A) cleavage-morula-blastula-gastrula. 
B) morula-cleavage-blastula-gastrula. 
C) blastula-cleavage-morula-gastrula. 
D) gastrula-cleavage-blastula-morula.

Question 5

Development of the neural system 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 6

A series of events occur during fertilization.Place the following events in the proper order in which they occur.a)The "slowblock" occurs.b)A single nuclear envelope surrounds both sperm and egg pronuclei.c)The acrosomes of sperm release digestive enzymes that allow the sperm to pass through the zona pellucida to the egg plasma membrane.d)Sperm cover the surface of the egg and secrete enzymes that help weaken the corona radiata.e)Pronuclei are formed.f)The "fast block" occurs.g)Microvilli bring the entire sperm into the egg.h)Sperm squeeze through the corona radiata and bind to the zona pellucida.

Accepted Answer

A) a,e,b,d,f,c,g,h 
B) d,h,c,f,a,g,e,b 
C) d,b,g,a,f,c,e,h 
D) f,a,d,h,c,g,e,b 
E) e,d,h,c,a,f,b,g 
A) a,e,b,d,f,c,g,h 
B) d,h,c,f,a,g,e,b 
C) d,b,g,a,f,c,e,h 
D) f,a,d,h,c,g,e,b 
E) e,d,h,c,a,f,b,g

Question 7

The preprogrammed theory of aging supports all of the following except

Accepted Answer

A) there is a genetic influence on aging. 
B) mutations that decrease the activity of a hormone receptor contribute to a longer lifespan. 
C) the accumulation of harmful DNA mutants builds up over time. 
D) longevity tends to run in families. 
E) identical twins have a similar life span. 
A) there is a genetic influence on aging. 
B) mutations that decrease the activity of a hormone receptor contribute to a longer lifespan. 
C) the accumulation of harmful DNA mutants builds up over time. 
D) longevity tends to run in families. 
E) identical twins have a similar life span.

Question 8

Which stage would show the development of the ectoderm and endoderm germ layers?

Accepted Answer

A) early gastrulation 
B) neurulation 
C) blastulation 
D) late gastrulation 
A) early gastrulation 
B) neurulation 
C) blastulation 
D) late gastrulation

Question 9

When discussing the morphogenesis of Drosophila melanogaster,homeotic gene codes for

Accepted Answer

A) proteins that bind to regulatory regions of DNA. 
B) proteins that determine anteroposterior polarity. 
C) proteins that determine which genes are turned on. 
D) proteins that bind to regulatory regions of DNA and proteins that determine which genes are turned on. 
E) All of the choices are correct. 
A) proteins that bind to regulatory regions of DNA. 
B) proteins that determine anteroposterior polarity. 
C) proteins that determine which genes are turned on. 
D) proteins that bind to regulatory regions of DNA and proteins that determine which genes are turned on. 
E) All of the choices are correct.

Question 10

Which of the following is the organ of exchange between the mother and fetus?

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 11

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Accepted Answer

A) A diet that consists of dark green vegetables,nuts and red wine. 
B) A diet that has a high level of cholesterol. 
C) A moderate exercise program. 
D) All of these will help slow the aging process. 
E) None of these will help slow the aging process. 
A) A diet that consists of dark green vegetables,nuts and red wine. 
B) A diet that has a high level of cholesterol. 
C) A moderate exercise program. 
D) All of these will help slow the aging process. 
E) None of these will help slow the aging process.

Question 12

Generally,only one sperm fertilizes an egg because

Accepted Answer

A) sperm are so few that two are unlikely to arrive at the same time. 
B) sperm compete against one another before entering,and only the most fit one is accepted. 
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 membrane fuses with the egg membrane,it forms a fertilization membrane,which forms a barrier to the penetration of other sperm. 
A) sperm are so few that two are unlikely to arrive at the same time. 
B) sperm compete against one another before entering,and only the most fit one is accepted. 
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 membrane fuses with the egg membrane,it forms a fertilization membrane,which forms a barrier to the penetration of other sperm.

Question 13

As we age we tend to see a decrease in the function of various body systems.A decrease in which system will lead to problems in regulating our temperature?

Accepted Answer

A) integumentary system 
B) cardiovascular system 
C) digestive system 
D) respiratory system 
E) excretory system 
A) integumentary system 
B) cardiovascular system 
C) digestive system 
D) respiratory system 
E) excretory system

Question 14

In what process does a fertilized egg undergo cell division without further growth?

Accepted Answer

A) cleavage 
B) gastrulation 
C) differentiation 
D) morphogenesis 
E) implantation 
A) cleavage 
B) gastrulation 
C) differentiation 
D) morphogenesis 
E) implantation

Question 15

Which system develops first in the embryo?

Accepted Answer

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

Question 16

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

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 17

The phenomenon of apoptosis or cell death,as it relates to morphogenesis in Drosphila melanogaster,

Accepted Answer

A) is a mechanism present in every cell that occurs when an inhibitory protein is inactivated. 
B) occurs when the cellular machinery simply wears out and the cell dies from being unable to continue vital processes. 
C) occurs when the ability of the cell to repair DNA mutations finally fails. 
D) is a disease phenomenon and cell death is always a bad trait. 
E) is not yet understood but probably involves the failure of the homeobox to correctly control development. 
A) is a mechanism present in every cell that occurs when an inhibitory protein is inactivated. 
B) occurs when the cellular machinery simply wears out and the cell dies from being unable to continue vital processes. 
C) occurs when the ability of the cell to repair DNA mutations finally fails. 
D) is a disease phenomenon and cell death is always a bad trait. 
E) is not yet understood but probably involves the failure of the homeobox to correctly control development.

Question 18

One of the earliest indications of cell differentiation is cellular movement.

Accepted Answer

A) True 
 B)False

Question 19

During the formation of an embryo,the hollow ball of cells having a fluid-filled cavity is called a

Accepted Answer

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

Question 20

Which of the following statements about embryonic development is NOT true?

Accepted Answer

A) A blastopore is the opening into the primitive gut formed by gastrulation. 
B) A blastocoel is the fluid-filled cavity of a blastula. 
C) A primitive gut is also referred to as an archenteron. 
D) The primitive streak occurs in the morula stage of the embryonic development. 
E) A zygote undergoes cleavage,which increases the cell number,but not the volume of the egg cytoplasm. 
A) A blastopore is the opening into the primitive gut formed by gastrulation. 
B) A blastocoel is the fluid-filled cavity of a blastula. 
C) A primitive gut is also referred to as an archenteron. 
D) The primitive streak occurs in the morula stage of the embryonic development. 
E) A zygote undergoes cleavage,which increases the cell number,but not the volume of the egg cytoplasm.

Exam 42: Animal Development

What statement about homeotic genes,as it relates to morphogenesis inDrosophila ,is NOT true?

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

What is the correct series of events during parturition? A.The amnion breaks. B.The cervix dilates. C.ACTH causes the adrenal cortex to release androgens into the bloodstream. D.Prostaglandins and oxytocin are produced. E.The baby is born and the umbilical cord is cut. F.The placenta is delivered.

The proper order of embryonic development is

Development of the neural system is characterized by

The preprogrammed theory of aging supports all of the following except

Which stage would show the development of the ectoderm and endoderm germ layers?

When discussing the morphogenesis of Drosophila melanogaster,homeotic gene codes for

Which of the following is the organ of exchange between the mother and fetus?

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Generally,only one sperm fertilizes an egg because

As we age we tend to see a decrease in the function of various body systems.A decrease in which system will lead to problems in regulating our temperature?

In what process does a fertilized egg undergo cell division without further growth?

Which system develops first in the embryo?

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

The phenomenon of apoptosis or cell death,as it relates to morphogenesis in Drosphila melanogaster,

One of the earliest indications of cell differentiation is cellular movement.

During the formation of an embryo,the hollow ball of cells having a fluid-filled cavity is called a

Which of the following statements about embryonic development is NOT true?

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

Filters