Question 1

Organs form and begin to function during the ____ period.

Accepted Answer

A)  embryonic 
B)  amniotic 
C)  fetal 
D)  chorionic 
E)  gastrulation 
A)  embryonic 
B)  amniotic 
C)  fetal 
D)  chorionic 
E)  gastrulation C

Question 2

The bicoid protein of a fruit fly is an example of _____.

Accepted Answer

A)  embryonic induction 
B)  epigenetics 
C)  differentiation 
D)  a morphogen 
E)  assimilation 
A)  embryonic induction 
B)  epigenetics 
C)  differentiation 
D)  a morphogen 
E)  assimilation D

Question 3

In an experiment with amphibian embryos,cells from a blastomere that was divided in two developed normally under which condition?

Accepted Answer

A)  When they contained at least half of the gray crescent 
B)  Only when cells did not have the gray crescent 
C)  Only when cells received the full amount of gray crescent 
D)  When cells were cleaved bilaterally 
E)  When cells were cleaved radially 
A)  When they contained at least half of the gray crescent 
B)  Only when cells did not have the gray crescent 
C)  Only when cells received the full amount of gray crescent 
D)  When cells were cleaved bilaterally 
E)  When cells were cleaved radially A

Question 4

The female hormone that participates in milk production is _____ and the hormone that stimulates milk glands to contract is _____.

Accepted Answer

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

Question 5

The process that causes embryonic cells to produce signals that alter the behavior of neighboring cells is known as

Accepted Answer

A)  contact inhibition. 
B)  ooplasmic localization. 
C)  embryonic induction. 
D)  pattern formation. 
E)  gene splicing. 
A)  contact inhibition. 
B)  ooplasmic localization. 
C)  embryonic induction. 
D)  pattern formation. 
E)  gene splicing.

Question 6

Choose the one best answer for each numbered item.
-Animal pole

Accepted Answer

A) Visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin 
B) The formation of three embryonic tissue layers 
C) The fusion of male and female nuclei 
D) The entire body divides transversely; each half grows and regenerates the missing part 
E) Selective gene expression results in different cell types
F)Subdividing of the zygote by mitosis; no growth occurs
G)Region of zygote that has less yolk and is pigmented
H)An embryonic stage of development that has three primary tissue layers before organogenesis begins
I)The formation of organs
J)One body part develops in response to signals from an adjacent part
K)The growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results
L)Programmed cell death, as occurs in the formation of the mouse paw 
A) Visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin 
B) The formation of three embryonic tissue layers 
C) The fusion of male and female nuclei 
D) The entire body divides transversely; each half grows and regenerates the missing part 
E) Selective gene expression results in different cell types
F)Subdividing of the zygote by mitosis; no growth occurs
G)Region of zygote that has less yolk and is pigmented
H)An embryonic stage of development that has three primary tissue layers before organogenesis begins
I)The formation of organs
J)One body part develops in response to signals from an adjacent part
K)The growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results
L)Programmed cell death, as occurs in the formation of the mouse paw

Question 7

Choose the one best answer for each numbered item.
-Gray crescent

Accepted Answer

A) Visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin 
B) The formation of three embryonic tissue layers 
C) The fusion of male and female nuclei 
D) The entire body divides transversely; each half grows and regenerates the missing part 
E) Selective gene expression results in different cell types
F)Subdividing of the zygote by mitosis; no growth occurs
G)Region of zygote that has less yolk and is pigmented
H)An embryonic stage of development that has three primary tissue layers before organogenesis begins
I)The formation of organs
J)One body part develops in response to signals from an adjacent part
K)The growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results
L)Programmed cell death, as occurs in the formation of the mouse paw 
A) Visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin 
B) The formation of three embryonic tissue layers 
C) The fusion of male and female nuclei 
D) The entire body divides transversely; each half grows and regenerates the missing part 
E) Selective gene expression results in different cell types
F)Subdividing of the zygote by mitosis; no growth occurs
G)Region of zygote that has less yolk and is pigmented
H)An embryonic stage of development that has three primary tissue layers before organogenesis begins
I)The formation of organs
J)One body part develops in response to signals from an adjacent part
K)The growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results
L)Programmed cell death, as occurs in the formation of the mouse paw

Question 8

Select the correct sequence of animal developmental events.

Accepted Answer

A)    
B)    
C)   
D)    
E)    
A)    
B)    
C)   
D)    
E)

Question 9

Gastrulation produces ____.

Accepted Answer

A)  hollow balls of cells 
B)  embryos with three primary tissue layers 
C)  solid balls of cells 
D)  specific organs 
E)  dead tissue 
A)  hollow balls of cells 
B)  embryos with three primary tissue layers 
C)  solid balls of cells 
D)  specific organs 
E)  dead tissue

Question 10

Figure on p. 737
 
Use the figure above showing the process of gastrulation to answer the following question.
-The letter "A" in the accompanying figure represents ____.

Accepted Answer

A)  ectoderm 
B)  endoderm 
C)  mesoderm 
D)  neural plate 
E)  yolk 
A)  ectoderm 
B)  endoderm 
C)  mesoderm 
D)  neural plate 
E)  yolk

Question 11

In yolk-rich eggs,cytoplasmic localization of the yolk results in which of the following?

Accepted Answer

A)  Yolk proteins concentrated at the animal pole 
B)  More cuts in the yolky part 
C)  Genetic material confined to the nucleus 
D)  Fewer cuts during cleavage in the vegetal pole 
E)  Reduced cytoplasm from the sperm 
A)  Yolk proteins concentrated at the animal pole 
B)  More cuts in the yolky part 
C)  Genetic material confined to the nucleus 
D)  Fewer cuts during cleavage in the vegetal pole 
E)  Reduced cytoplasm from the sperm

Question 12

In amphibian eggs,a pigmented area called the ____ appears after fertilization.

Accepted Answer

A)  gray matter 
B)  gray crescent 
C)  blastomere 
D)  cleavage plane 
E)  gray oocyte 
A)  gray matter 
B)  gray crescent 
C)  blastomere 
D)  cleavage plane 
E)  gray oocyte

Question 13

Figure 42.2
The following questions refer to the figure above illustrating frog development.
-Cleavage is indicated by the letter ____.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 14

In _______,one subset of cells affects the developmental pathway of other cells.

Accepted Answer

The answer of In _______,one subset of cells affects the...

Question 15

In humans,the term embryo refers to the following period of time: ____.

Accepted Answer

A)  from the ninth week after fertilization until birth 
B)  from the eighth week after fertilization until birth 
C)  from fertilization until the ninth week after fertilization 
D)  from 2 to 10 weeks after fertilization 
E)  from 2 to 8 weeks after fertilization 
A)  from the ninth week after fertilization until birth 
B)  from the eighth week after fertilization until birth 
C)  from fertilization until the ninth week after fertilization 
D)  from 2 to 10 weeks after fertilization 
E)  from 2 to 8 weeks after fertilization

Question 16

All of the following statements are true EXCEPT

Accepted Answer

A)  cytoplasmic localization occurs in all oocytes. 
B)  in a yolk-rich egg, most yolk is at one pole and the opposite pole has little yolk. 
C)  during cleavage, a furrow appears on the cell surface and defines the plane of the cut. 
D)  deuterostomes undergo bilateral cleavage. 
E)  cleavage results in descendant cells with different types and proportions of substances. 
A)  cytoplasmic localization occurs in all oocytes. 
B)  in a yolk-rich egg, most yolk is at one pole and the opposite pole has little yolk. 
C)  during cleavage, a furrow appears on the cell surface and defines the plane of the cut. 
D)  deuterostomes undergo bilateral cleavage. 
E)  cleavage results in descendant cells with different types and proportions of substances.

Question 17

Nutrients and antibodies move across the placenta from mother to embryo or fetus,as do __________,which can cause birth defects.

Accepted Answer

The answer of Nutrients and antibodies move across the placenta...

Question 18

Which of the following does not necessitate surgical delivery?

Accepted Answer

A)  Dislodged placenta 
B)  Kinked umbilical cord 
C)  Maternal age above 30 
D)  A sexually transmitted disease in the mother 
E)  A placenta that covers the cervix 
A)  Dislodged placenta 
B)  Kinked umbilical cord 
C)  Maternal age above 30 
D)  A sexually transmitted disease in the mother 
E)  A placenta that covers the cervix

Question 19

Choose the one best answer for each numbered item.
-Fertilization

Accepted Answer

A) Visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin 
B) The formation of three embryonic tissue layers 
C) The fusion of male and female nuclei 
D) The entire body divides transversely; each half grows and regenerates the missing part 
E) Selective gene expression results in different cell types
F)Subdividing of the zygote by mitosis; no growth occurs
G)Region of zygote that has less yolk and is pigmented
H)An embryonic stage of development that has three primary tissue layers before organogenesis begins
I)The formation of organs
J)One body part develops in response to signals from an adjacent part
K)The growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results
L)Programmed cell death, as occurs in the formation of the mouse paw 
A) Visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin 
B) The formation of three embryonic tissue layers 
C) The fusion of male and female nuclei 
D) The entire body divides transversely; each half grows and regenerates the missing part 
E) Selective gene expression results in different cell types
F)Subdividing of the zygote by mitosis; no growth occurs
G)Region of zygote that has less yolk and is pigmented
H)An embryonic stage of development that has three primary tissue layers before organogenesis begins
I)The formation of organs
J)One body part develops in response to signals from an adjacent part
K)The growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results
L)Programmed cell death, as occurs in the formation of the mouse paw

Question 20

In humans,during which stage of development is the body plan set in place and organs begin to form?

Accepted Answer

A)  Zygote 
B)  Blastula 
C)  Amniote 
D)  Fetus 
E)  Embryo 
A)  Zygote 
B)  Blastula 
C)  Amniote 
D)  Fetus 
E)  Embryo

Exam 42: Animal Development

Organs form and begin to function during the ____ period.

The bicoid protein of a fruit fly is an example of _____.

In an experiment with amphibian embryos,cells from a blastomere that was divided in two developed normally under which condition?

The female hormone that participates in milk production is _____ and the hormone that stimulates milk glands to contract is _____.

The process that causes embryonic cells to produce signals that alter the behavior of neighboring cells is known as

Choose the one best answer for each numbered item. -Animal pole

Choose the one best answer for each numbered item. -Gray crescent

Select the correct sequence of animal developmental events.

Gastrulation produces ____.

Figure on p. 737 Use the figure above showing the process of gastrulation to answer the following question. -The letter "A" in the accompanying figure represents ____.

In yolk-rich eggs,cytoplasmic localization of the yolk results in which of the following?

In amphibian eggs,a pigmented area called the ____ appears after fertilization.

Figure 42.2 The following questions refer to the figure above illustrating frog development. -Cleavage is indicated by the letter ____.

In _______,one subset of cells affects the developmental pathway of other cells.

In humans,the term embryo refers to the following period of time: ____.

All of the following statements are true EXCEPT

Nutrients and antibodies move across the placenta from mother to embryo or fetus,as do __________,which can cause birth defects.

Which of the following does not necessitate surgical delivery?

Choose the one best answer for each numbered item. -Fertilization

In humans,during which stage of development is the body plan set in place and organs begin to form?

Invitation to Biology

Life's Chemical Bases

Molecules of Life

Cell Structure

Ground Rules of Metabolism

Where it Starts—Photosynthesis

How Cells Release Chemical Energy

DNA Structure and Function

From DNA to Protein

Control of Gene Expression

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Processes of Evolution

Organizing Information about Species

Life's Origin and Early Evolution

Viruses, Bacteria, and Archaea

Protists: The Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolution: The Invertebrates

Animal Evolution: The Chordates

Human Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive System

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

The female hormone that participates in milk production is _ and the hormone that stimulates milk glands to contract is _.