Multiple Choice
A zygote forms
A) as soon as a sperm cell penetrates an egg cell.
B) when the embryo implants in the uterine wall
C) when a fertilized egg divides to produce two cells.
D) after at least two divisions of a fertilized egg.
E) after many divisions of a fertilized egg.
Correct Answer:
Verified
Correct Answer:
Verified
Q12: Which of the following developmental events occurs
Q13: In frogs, the gray crescent appears<br>A)after the
Q14: Which of the following is a single-layered,
Q15: A zygote is formed at this stage.<br>A)A<br>B)B<br>C)C<br>D)D<br>E)E
Q16: Organ formation is indicated by<br>A)A.<br>B)B.<br>C)C.<br>D)D.<br>E)E.
Q19: Muscles differentiate from which tissue?<br>A)ectoderm<br>B)endoderm<br>C)mesoderm<br>D)somatoderm<br>E)all of these
Q20: The primary tissue layers are formed in
Q21: Successive cell divisions convert the zygote into
Q22: The blastula forms before this stage.<br>A)A<br>B)B<br>C)C<br>D)D<br>E)E
Q68: Which embryonic tissue is incorrectly associated with