Which of the following is a single-layered, fluid-filled ball of cells?
A) cleavage
B) morula
C) gastrula
D) zygote
E) blastula
Correct Answer:
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Q6: Which stage of development involves initial cellular
Q11: The primary tissue layers are formed in
Q12: Organ formation is indicated by
A)A.
B)B.
C)C.
D)D.
E)E.
Q13: Q14: A zygote is formed at this stage. Q15: Which of the following developmental events occurs Q16: Gastrulation produces Q18: Organs gradually assume specialized functions at this Q20: The heart, muscles, bones, and blood develop Q21: Muscles differentiate from which tissue?
A)A
B)B
C)C
D)D
E)E
A) hollow balls of cells.
B) embryos
A)ectoderm
B)endoderm
C)mesoderm
D)somatoderm
E)all of these
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