The blastopore is the ____.
A) opening of the archenteron at the animal pole
B) opening of the archenteron at the vegetal pole
C) outer layer of the blastula
D) cavity in the blastula formed by invagination
E) region of the blastula establishing dorsal-ventral polarity
Correct Answer:
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Q18: At the cellular level, the development of
Q19: In an egg, the _ pole typically
Q20: At the cellular level, the development of
Q21: Muscles originate from the _.
A) ectoderm only
B)
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Q24: Cells capable of producing all the various
Q25: In sea urchin embryogenesis, the mouth is
Q26: Place the three primary cell layers of
Q27: In _, one group of cells causes
Q28: During _, the three germ layers rearrange
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