Question 1

If an organism is missing the outer layer of skin upon birth, which of the following might be the cause?

Accepted Answer

A)  improper development of the mesoderm 
B)  improper development of the endoderm 
C)  improper development of the ectoderm 
D)  improper development of the endoderm and the mesoderm

Question 2

Without programmed cell death, your ________ might look more like a ________.

Accepted Answer

A)  hand; paddle 
B)  head; hand 
C)  leg; heart 
D)  foot; hoof

Question 3

Versions of homeobox genes have been found in plants and fungi.

Accepted Answer

A) True 
 B)False

Question 4

The blastocoel is the hollow cavity in the morula.

Accepted Answer

A) True 
 B)False

Question 5

The process of fertilization produces a/an:

Accepted Answer

A)  embryo. 
B)  blastula. 
C)  morula. 
D)  gastrula. 
E)  zygote.

Question 6

The morula stage is part of which phase of embryonic development?

Accepted Answer

The answer of The morula stage is part of which...

Question 7

Match the following. Answers may be used more than once.
A) mesoderm
B) ectoderm
C) endoderm
-Digestive tract lining

Accepted Answer

The answer of Match the following. Answers may be used...

Question 8

Cleavage and gastrulation take place in animals such as humans and birds but not in frogs.

Accepted Answer

A) True 
 B)False

Question 9

If you could stop diffusion of substances in fruit fly zygotes, could you stop normal development? Why or why not?

Accepted Answer

The answer of If you could stop diffusion of substances...

Question 10

Match the following. Answers may be used more than once.
A) mesoderm
B) ectoderm
C) endoderm
-Skeletal system

Accepted Answer

The answer of Match the following. Answers may be used...

Question 11

In chickens, the wings develop from a zone of polarizing activity (ZPA).

Accepted Answer

A) True 
 B)False

Question 12

Which is true regarding somites in an embryo?

Accepted Answer

A)  Somites will become vertebrae. 
B)  Somites are found inside the notochord. 
C)  Somites will form the skull. 
D)  Somites will form the lungs.

Question 13

Bicoid mRNAs are produced by the zygote.

Accepted Answer

A) True 
 B)False

Question 14

The earliest stage of development in which cells move to particular places in the developing embryo is ________.

Accepted Answer

The answer of The earliest stage of development in which...

Question 15

Programmed cell death is also known as ________.

Accepted Answer

The answer of Programmed cell death is also known as...

Question 16

Place the following steps of organogenesis in the correct order: (1) neural crest cells break away, (2) neural folds grow into a neural tube, (3) the notochord induces development of the neural plate.

Accepted Answer

A)  1, 2, 3 
B)  1, 3, 2 
C)  3, 1, 2 
D)  2, 3, 1 
E)  3, 2, 1

Question 17

Development occurs:

Accepted Answer

A)  throughout the life of the organism. 
B)  only in non-dividing cells. 
C)  only during growth of the organism. 
D)  only in animals.

Question 18

You are a substitute teacher in a high school biology lab class on the day the students are dissecting fetal pigs. One student finds that his pig's lungs, liver, pancreas, and digestive organs are either missing or small and malformed. The student scratches his head with his clean hand and says, "What went on here?" Although there may be more than one reason, what might you propose as an explanation based on embryonic development?

Accepted Answer

The answer of You are a substitute teacher in a...

Question 19

Cells first arrange themselves into layers during organogenesis.

Accepted Answer

A) True 
 B)False

Question 20

Refer to the figure below, and then answer the question that follows. 
-Which label, A, B, or C, points to a structure formed from the archenteron during gastrulation?

Accepted Answer

The answer of Refer to the figure below, and then...

Exam 32: An Amazingly Detailed Script: Animal Development

If an organism is missing the outer layer of skin upon birth, which of the following might be the cause?

Without programmed cell death, your might look more like a .

Versions of homeobox genes have been found in plants and fungi.

The blastocoel is the hollow cavity in the morula.

The process of fertilization produces a/an:

The morula stage is part of which phase of embryonic development?

Match the following. Answers may be used more than once. A) mesoderm B) ectoderm C) endoderm -Digestive tract lining

Cleavage and gastrulation take place in animals such as humans and birds but not in frogs.

If you could stop diffusion of substances in fruit fly zygotes, could you stop normal development? Why or why not?

Match the following. Answers may be used more than once. A) mesoderm B) ectoderm C) endoderm -Skeletal system

In chickens, the wings develop from a zone of polarizing activity (ZPA).

Which is true regarding somites in an embryo?

Bicoid mRNAs are produced by the zygote.

The earliest stage of development in which cells move to particular places in the developing embryo is ________.

Programmed cell death is also known as ________.

Place the following steps of organogenesis in the correct order: (1) neural crest cells break away, (2) neural folds grow into a neural tube, (3) the notochord induces development of the neural plate.

Development occurs:

Cells first arrange themselves into layers during organogenesis.

Refer to the figure below, and then answer the question that follows. -Which label, A, B, or C, points to a structure formed from the archenteron during gastrulation?