In sea urchin embryogenesis, the mouth is formed ____.
A) where the archenteron contacts the ectoderm
B) by the blastopore
C) by the blastocoel
D) by migrating secondary mesenchyme cells
E) where the blastopore contacts the ectoderm
Correct Answer:
Verified
Q20: At the cellular level, the development of
Q21: Muscles originate from the _.
A) ectoderm only
B)
Q22: In sea urchins, the primary mesenchyme cells
Q23: The blastopore is the _.
A) opening of
Q24: Cells capable of producing all the various
Q26: Place the three primary cell layers of
Q27: In _, one group of cells causes
Q28: During _, the three germ layers rearrange
Q29: Apoptosis is _.
A) cell determination
B) cell induction
C)
Q30: Place the cellular processes responsible for animal
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