c . possessing a notochord .
d . the second embryonic opening becoming the mouth .
e . the coelom forming by outpocketing of the primitive gut .
Feedback
Question 3
Which of these parasitic worms is NOT a nematode ?
Select one :
a . Ascaris
b . Trichinella
c . the worm that causes elephantiasis
d . hookworm
e . the worm that causes schistosomiasis
Feedback
Question 4
Which of the following organisms exhibit radial symmetry as adults ?
Select one :