During cleavage, cell division is rapid because
A) cells undergo mitosis without any intervening synthesis of DNA.
B) the G1 and G2 phases of the cell cycle may be virtually eliminated.
C) the S phase is reduced in time.
D) components of the spindle are more rapidly synthesised.
E) the presence of yolk speeds up cytokinesis.
Correct Answer:
Verified
Q1: Of the main processes in embryogenesis, which
Q2: During cleavage, the
A) total amount of cytoplasm
Q4: In animal development, cleavage refers to
A) the
Q5: If a zygote has a high concentration
Q6: Which of the following statements about early
Q7: A blastula that is spherical in shape,
Q8: During gastrulation the blastocoel becomes
A) the coelom.
B)
Q9: Nervous tissue forms from
A) ectoderm.
B) mesoderm.
C) endoderm.
D)
Q10: You observe an animal embryo that is
Q11: You observe an animal embryo that is
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