Multiple Choice
Which of the following statements about animal development is false?
A) Signaling molecules interact to produce different combinations of signals that eventually guide embryonic cells to differentiate along different pathways.
B) -catenin is necessary but not sufficient for the formation of the primary embryonic organizer.
C) Blastomeres are early embryonic cells.
D) The mouth of the sea urchin forms where the archenteron makes contact with the ectoderm.
E) Cells actively migrate during gastrulation.
Correct Answer:
Verified
Correct Answer:
Verified
Q2: Gastrulation in reptiles and birds includes a
Q3: Of the three germ layers that develop
Q4: The gray crescent is the region of
Q5: The mesoderm gives rise to<br>A) the lining
Q6: All of the following are characteristic of
Q8: The rupturing of two extraembryonic membranes and
Q9: In organisms such as the chick, in
Q10: Which of the following is true of
Q11: Thalidomide is a drug known to disrupt
Q12: The movement of cells toward the blastopore