Neighboring cells influence the development of each other,either by direct contact or by production of chemical signals,in
A) neurulation.
B) induction.
C) maternal determinants.
D) homeotic pattern formation.
Correct Answer:
Verified
Q21: When the central mass of yolk restricts
Q22: The allantois
A)becomes the chorionic villi.
B)lies next to
Q23: The difference between primary and secondary induction
Q24: The placenta develops from
A)fetal membranes only.
B)maternal tissue
Q25: The conclusion of Spemann's work,in which he
Q27: The special blastomere labeled the 4-d cell
Q28: Which of the following is NOT characteristic
Q29: The internal pouch representing the developing gut
Q30: An enterocoelous animal has
A)a true coelom.
B)a pseudocoelom.
C)no
Q31: Superficial cleavage is found in
A)amphibians.
B)mammals.
C)sea stars.
D)insects.
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