Question 1

The formation of the embryonic tissue layers occurs during ________.

Accepted Answer

The answer of The formation of the embryonic tissue layers...

Question 2

The proteins that bind to the DNA near regions where gene transcription begins are called:

Accepted Answer

A)  mRNA.
B)  promoter genes.
C)  the gray crescent.
D)  homeobox genes.
E)  transcription factors.

Question 3

The metamorphosis of a caterpillar into a butterfly is an example of:

Accepted Answer

A)  direct development.
B)  placental development.
C)  indirect development.
D)  internal development.
E)  external development.

Question 4

Muscles and bones develop from the embryonic ________.

Accepted Answer

The answer of Muscles and bones develop from the embryonic...

Question 5

In placental organisms, the _______ is the fetal contribution to the placenta.

Accepted Answer

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

Question 6

How is blood flow in the placenta maintained so that there is maximum opportunity for the exchange of materials while still keeping the mother's and baby's bloods separate?

Accepted Answer

The mother's capillaries break down so t...

Question 7

A mad scientist decides to start combining embryos and see what develops. He takes bits from the blastula of a frog with blue skin and transplants them into the blastula of a yellow-skinned frog. The embryo develops blue cells in its brain and spinal cord. The scientist must have transplanted the cells into the:

Accepted Answer

A)  ectoderm.
B)  mesoderm.
C)  endoderm.
D)  allantois.
E)  yolk sac.

Question 8

Newborn animals that closely resemble the adults of their species undergo ________ development.

Accepted Answer

The answer of Newborn animals that closely resemble the adults...

Question 9

Blood cells form from structure:

Accepted Answer

A)  1) 
B)  2) 
C)  3) 
D)  4) 
E)  5)

Question 10

Cellular differentiation depends on which genes are expressed in the cell. True or False?

Accepted Answer

A) True 
 B)False

Question 11

A ________ is a fertilized egg.

Accepted Answer

The answer of A ________ is a fertilized egg....

Question 12

Homeobox genes determine the overall shape of the body and the location of its parts. True or False?

Accepted Answer

A) True 
 B)False

Question 13

All amphibians, reptiles, and mammals pass through embryonic stages in which they have tails and webbed fingers. True or False?

Accepted Answer

A) True 
 B)False

Question 14

The fluid the embryo floats in is produced by structure:

Accepted Answer

A)  1) 
B)  2) 
C)  3) 
D)  4) 
E)  5)

Question 15

The cells of an aging animal function less efficiently because:

Accepted Answer

A)  their metabolic rate is very low.
B)  they lose their organelles.
C)  they cannot repair their DNA.
D)  protein synthesis has stopped.
E)  they cannot divide by mitosis.

Question 16

In blastulas, if cells from an area that would normally become skin are transplanted into an area that would become nervous system, the transplanted cells will become nervous system. True or False?

Accepted Answer

A) True 
 B)False

Question 17

How do undifferentiated cells "know" what to become?

Accepted Answer

Interactions among neighboring...

Question 18

The process through which a human embryo develops into an adult is called metamorphosis. True or False?

Accepted Answer

A) True 
 B)False

Question 19

What is the main purpose of the last seven months of pregnancy?

Accepted Answer

A)  formation of major organs
B)  organization of organs into organ systems
C)  formation of the brain
D)  growth
E)  formation of cell layers

Question 20

In the placenta:

Accepted Answer

A)  chorionic villi are bathed in pools of maternal blood.
B)  fetal blood and maternal blood mix.
C)  all substances in maternal blood that may be harmful to the fetus are prevented from going through.
D)  the amnion and the chorion grow into the uterus wall.
E)  hormones are absorbed to prevent them from influencing the developing fetus.

Exam 42: Animal Development

How is blood flow in the placenta maintained so that there is maximum opportunity for the exchange of materials while still keeping the mother's and baby's bloods separate?

Correct Answer
verified
The mother's capillaries break down so t...
View Answer

All amphibians, reptiles, and mammals pass through embryonic stages in which they have tails and webbed fingers. True or False?

Correct Answer
verified

The process through which a human embryo develops into an adult is called metamorphosis. True or False?

Correct Answer
verified

Cellular differentiation depends on which genes are expressed in the cell. True or False?

Correct Answer
verified

In blastulas, if cells from an area that would normally become skin are transplanted into an area that would become nervous system, the transplanted cells will become nervous system. True or False?

Correct Answer
verified

In the placenta:

Correct Answer
verified

In placental organisms, the _______ is the fetal contribution to the placenta.

Correct Answer
verified

How do undifferentiated cells "know" what to become?

Correct Answer
verified
Interactions among neighboring...
View Answer

The cells of an aging animal function less efficiently because:

Correct Answer
verified

The fluid the embryo floats in is produced by structure:

Correct Answer
verified

What is the main purpose of the last seven months of pregnancy?

Correct Answer
verified

The metamorphosis of a caterpillar into a butterfly is an example of:

Correct Answer
verified

Blood cells form from structure:

Correct Answer
verified

The formation of the embryonic tissue layers occurs during ________.

Correct Answer
verified

Muscles and bones develop from the embryonic ________.

Correct Answer
verified

Homeobox genes determine the overall shape of the body and the location of its parts. True or False?

Correct Answer
verified

The proteins that bind to the DNA near regions where gene transcription begins are called:

Correct Answer
verified

A ________ is a fertilized egg.

Correct Answer
verified

Correct Answer
verified

Newborn animals that closely resemble the adults of their species undergo ________ development.

Correct Answer
verified

Exam 42: Animal Development

How is blood flow in the placenta maintained so that there is maximum opportunity for the exchange of materials while still keeping the mother's and baby's bloods separate?

Correct AnswerverifiedThe mother's capillaries break down so t...View AnswerShow Answer

All amphibians, reptiles, and mammals pass through embryonic stages in which they have tails and webbed fingers. True or False?

Correct AnswerverifiedShow Answer

The process through which a human embryo develops into an adult is called metamorphosis. True or False?

Correct AnswerverifiedShow Answer

Cellular differentiation depends on which genes are expressed in the cell. True or False?

Correct AnswerverifiedShow Answer

In blastulas, if cells from an area that would normally become skin are transplanted into an area that would become nervous system, the transplanted cells will become nervous system. True or False?

Correct AnswerverifiedShow Answer

In the placenta:

Correct AnswerverifiedShow Answer

In placental organisms, the _______ is the fetal contribution to the placenta.

Correct AnswerverifiedShow Answer

How do undifferentiated cells "know" what to become?

Correct AnswerverifiedInteractions among neighboring...View AnswerShow Answer

The cells of an aging animal function less efficiently because:

Correct AnswerverifiedShow Answer

The fluid the embryo floats in is produced by structure:

Correct AnswerverifiedShow Answer

What is the main purpose of the last seven months of pregnancy?

Correct AnswerverifiedShow Answer

The metamorphosis of a caterpillar into a butterfly is an example of:

Correct AnswerverifiedShow Answer

Blood cells form from structure:

Correct AnswerverifiedShow Answer

The formation of the embryonic tissue layers occurs during ________.

Correct AnswerverifiedShow Answer

Muscles and bones develop from the embryonic ________.

Correct AnswerverifiedShow Answer

Homeobox genes determine the overall shape of the body and the location of its parts. True or False?

Correct AnswerverifiedShow Answer

The proteins that bind to the DNA near regions where gene transcription begins are called:

Correct AnswerverifiedShow Answer

A ________ is a fertilized egg.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Newborn animals that closely resemble the adults of their species undergo ________ development.

Correct AnswerverifiedShow Answer

Correct Answer
verified
The mother's capillaries break down so t...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Interactions among neighboring...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified