In sea urchins, the primary mesenchyme cells eventually become the ____.
A) ectoderm
B) endoderm
C) mesoderm
D) endoderm and mesoderm
E) ectoderm and endoderm
Correct Answer:
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Q17: Eggs from which organism contain the lowest
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)
Q23: The blastopore is the _.
A) opening of
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
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