BIO 351 MODULE 3 QUESTIONS WITH CORRECT ANSWERS .

BIO 351 MODULE 3 QUESTIONS WITH
CORRECT ANSWERS 2025/2026

Module 3
Quiz 1.

1. The neural tube forms from the folding of the neural plate. Which region of the neural plate-
CORRECT ANSWER -

fuses together to form the dorsal

neural tube?

C



2. The neural tube forms from the folding of the neural plate. Which region of the neural tube is
the first to close? - CORRECT ANSWER -

B



3. In the mouse embryo, this tissue provides important cues that specify the anterior-posterior
orientation of the primitive streak. Name this tissue. - CORRECT ANSWER -

anterior visceral endoderm



4. The brain is derived from which of the following ? - CORRECT ANSWER -

ectoderm



Quiz 3.2 - CORRECT ANSWER -1. The brain derives from which of the following types of
embryonic cells?

Ectoderm

, 2. Which of the following defects is a severe open neural tube defect caused by failure of rostral
neural tube closure?

anencephaly



3. The neural tube forms from the folding of the neural plate. Which region of the neural plate
fuses together to form the dorsal neural tube?

C



4. Which of the following is an occult, and not an open, neural tube defect?

Spina bifida occulta



Quiz 3.3 - CORRECT ANSWER -
1. The neural tube is regionalized by developmental gene regulation. Which of the following
correctly matches the gene and specified region?

Shh - ventralizing the neural tube



2. Which of the following regulates the segmentation of the hindbrain rhombomeres? Hox g
ene expression



3. Which of the following are the initial brain vesicles, in a rostral-caudal order?

Forebrain-midbrain-hindbrain



4. Which of these central nervous system structures are correctly listed in a rostral to caudal
order?

Cerebrum, Medulla, Spinal Cord