Development

Question 1

What is the correct order of the stages of development?

a. Zygote -> Blastulation -> Gastrulation -> Cleavage -> Organogenesis
b. Zygote -> Blastulation -> Cleavage -> Gastrulation -> Organogenesis
c. Zygote -> Cleavage -> Gastrulation -> Blastulation -> Organogenesis
d. Zygote -> Cleavage -> Blastulation -> Gastrulation -> Organogenesis

Answer 1

d. Zygote -> Cleavage -> Blastulation -> Gastrulation -> Organogenesis

Question 2

Which of the following is a totipotent cell?

a. A cell of the placenta
b. A cell of the inner cell mass
c. A cell of the morula
d. A cell of the ectoderm

Answer 2

c. A cell of the morula

Question 3

Which of the following is a pluripotent cell?

a. A fibroblast
b. A cell of the inner cell mass
c. A zygote
d. A cell of the endoderm

Answer 3

b. A cell of the inner cell mass

Question 4

Which process leads to the formation of ectoderm during embryonic development?

a. Fertilization
b. Organogenesis
c. Gastrulation
d. Blastulation

Answer 4

c. Gastrulation

Question 5

When the embryo has reached the 16-cell stage, it is termed the:

a. zygote
b. morula
c. gastrula
d. embryo

Answer 5

b. morula

Question 6

During the process of embryogenesis, successive rapid mitotic divisions without the growth of daughter cells occur during a specific stage in development. This event is known as:

a. cleavage
b. implantation
c. gastrulation
d. fertilization

Answer 6

a. cleavage

Question 7

Cell type differentiation is an important process that occurs during embryonic development. A differentiated and undifferentiated cell differ in terms of:

a. number of chromosomes
b. gene expression
c. location of cell
d. motility

Answer 7

b. gene expression

Question 8

A molecule is secreted during embryonic development that causes cells to express a particular set of genes and become specialized. What kind of molecule is it?

Answer 8

Morphogens

Question 9

Which of the following statements is correct about the specialization of cells during embryonic development?

a. Differentiation occurs before cell fate determination
b. Morphogens affect determination, but not differentiation
c. Determination results in cells with less specialized functions
d. Cellular migration can cause specialization

Answer 9

d. Cellular migration can cause specialization

Question 10

The central and peripheral nervous systems are formed from which of the following?

a. Neural crest ectoderm
b. Neural plate ectoderm
c. Notochord
d. Neural tube

Answer 10

b. Neural plate ectoderm