Which structure folds over to form the neural tube?
a. the coelom
b. the primitive streak
c. the neural plate
d. pharyngeal arches
e. the notochord
C
You might also like to view...
Why don't corneal transplants (in the eye) provoke an immune response?
a. corneas are not cellular structures b. corneal cells secrete a chemical to trigger apoptosis in attacking lymphocytes c. lymphocytes recognize all corneas as "self" d. there are no lymphocytes in the eye e. corneal cells resemble lymphocytes
These lipids have a hydrophobic part and a hydrophilic part
A) triglycerides B) carotenoids C) phospholipids D) steroids
Endocrine function typically involves
A. coordinated activity of several hormones. B. single hormones responding to nervous stimulation. C. hormones being used in the immediate vicinity of their place of production. D. gland cells being transported to where they are needed.
Genetic drift is the result of ________
A) natural selection B) chance C) a large gene pool D) environmental variation