Chapter 44: Animal Development

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

Multiple Choice

 

1. The sperm contributes _______ to the zygote.
2. a nucleus
3. half of the mitochondria and a nucleus
4. a centriole and a nucleus
5. cilium and a nucleus
6. All of the above

Answer: c

Textbook Reference: 44.1 How Does Fertilization Activate Development?

Page: 923

Bloom’s Category: 2. Understanding

 

2. In frogs, the sperm penetrates
3. in the region of the vegetal pole.
4. in the region of the animal pole.
5. in the region of the gray crescent.
6. on the border of the animal and vegetal poles.
7. in the region of either pole or of the gray crescent.

Answer: b

Textbook Reference: 44.1 How Does Fertilization Activate Development?

Page: 924

Bloom’s Category: 1. Remembering

 

3. The gray crescent
4. is observable in the frog zygote.
5. develops at the site of sperm entry.
6. causes rotation of the cortical cytoplasm.
7. induces formation of the optic cup.
8. can be mimicked by retinoic acid.

Answer: a

Textbook Reference: 44.1 How Does Fertilization Activate Development?

Page: 924

Bloom’s Category: 2. Understanding

 

4. Which of the following play a role as cytoplasmic determinants in directing embryonic development?
5. Transcription factors
6. Protein kinases
7. Protein kinase inhibitors
8. β-catenin
9. All of the above

Answer: e

Textbook Reference: 44.1 How Does Fertilization Activate Development?

Page: 924

Bloom’s Category: 2. Understanding

 

5. The gray crescent is the region of the egg
6. that is opposite the site of sperm penetration.
7. where gastrulation begins.
8. that was pigmented before cytoplasmic rearrangement.
9. where the dorsal lip of the blastopore develops.
10. All of the above

Answer: e

Textbook Reference: 44.1 How Does Fertilization Activate Development?

Page: 924

Bloom’s Category: 2. Understanding