A primitive streak appears during gastrulation of
A) sea stars and humans.
B) birds and reptiles.
C) nemerteans.
D) only mammals.
Correct Answer:
Verified
Q30: An enterocoelous animal has
A)a true coelom.
B)a pseudocoelom.
C)no
Q31: Superficial cleavage is found in
A)amphibians.
B)mammals.
C)sea stars.
D)insects.
Q32: Which is NOT an extraembryonic membrane?
A)Amnion
B)Placenta
C)Yolk sac
D)Allantois
Q33: "Diploblastic" refers to _ where _.
A)fish and
Q34: The difference between schizocoelous and enterocoelus organisms
Q36: Mosaic development in animals
A)is a type in
Q37: A developmental stage comprised of a hollow
Q38: In nearly all metazoa,"germ layers" is a
Q39: In the human,which part of the blastocyst
Q40: In mammals,the organ of exchange between the
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