Activities Quiz
1.

In sea urchins, the process of fertilization produces a(n) _____. (Activity 47A)

archenteron
morula
gastrula
gamete
zygote


2.

What is the cortical reaction? (Activity 47A)

the formation of a fertilization envelope that bars additional sperm from entry into the egg
the release of hydrolytic enzymes from the sperm cell
a depolarization of the eggs' plasma membrane so that only one sperm cell can fuse with it
a series of rapid mitotic divisions that follow fertilization
the process that forms a three-layered embryo


3.

As cleavage continues, a zygote forms into a solid multicellular ball called a(n) _____. (Activity 47A)

endometrium
morula
trophoblast
gastrula
blastula


4.

Several hours after fertilization, cleavage results in the formation of a hollow ball of cells called a _____. (Activity 47A)

blastomere
morula
trophoblast
gastrula
blastula


5.

The three-layered embryo is the _____. (Activity 47A)

archenteron
morula
trophoblast
gastrula
blastula


6.

The _____ eventually develops into the sea urchin's digestive tract. (Activity 47A)

blastocoel
archenteron
blastomere
ectoderm
blastopore


7.

During gastrulation, invagination occurs at the _____. (Activity 47A)

archenteron
blastocoel
endometrium
blastopore
trophoblast


8.

In vertebrates, the ectoderm gives rise to the _____. (Activity 47A)

skeleton
circulatory system
outer layer of skin
lining of the digestive tract
pancreas


9.

During gastrulation in frogs, a rod of mesoderm under the dorsal surface forms the _____. (Activity 47B)

notochord
ectoderm
endoderm
archenteron
blastopore


10.

During gastrulation in frogs, cells from the animal pole spread over the embryo and form the _____. (Activity 47B)

endoderm
ectoderm
archenteron
blastopore
blastula


11.

The notochord functions as a core around which mesodermal cells form the frog's _____. (Activity 47B)

backbone
blastopore
endometrium
nervous system
archenteron


12.

An ectodermal thickening above the frog's notochord forms a _____. (Activity 47B)

pancreas
neural plate
skeleton
liver
lining of the stomach


13.

The _____ is(are) formed when the neural folds join and a portion of the neural plate sinks beneath the embryo's surface. (Activity 47B)

archenteron
anus
back muscles
neural tube
digestive system


14.

The enlarged anterior portion of the neural tube will develop into a frog's _____. (Activity 47B)

spinal cord
tongue
reproductive system
outer layer of skin
brain


15.

The posterior portion of the neural tube will develop into the frog's _____. (Activity 47B)

spinal cord
brain
blastocoel
digestive tract
anus



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publishing as Benjamin Cummings