Which of the following is a single-layered, hollow ball of 16 cells?
A) cleavage
B) morula
C) gastrula
D) zygote
E) blastula
Correct Answer:
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Q13: Select the correct sequence of animal developmental
Q14: Muscles differentiate from which tissue?
A) ectoderm
B) endoderm
C)
Q15: Each new cell that forms during cleavage
Q16: The primary germ layers include all of
Q17: The urinary system develops primarily from
A) ectoderm.
B)
Q19: Which embryonic tissue is incorrectly associated with
Q20: Shortly after fertilization, successive cell divisions convert
Q21: The explanation for the differences between a
Q22: Which of the following is responsible for
Q23: At implantation the blastocyst breaks out of
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