In the developing chick, the _______ and _______ perform functions equivalent to those of the _______ and _______, respectively, in the developing frog.
A) hypoblast; epiblast; blastopore; dorsal lip of the blastopore
B) primitive groove; Hensen's node; blastopore; dorsal lip of the blastopore
C) blastodisc; yolk mass; blastopore; dorsal lip of the blastopore
D) primitive groove; Hensen's node; dorsal lip of the blastopore; blastodisc
E) primitive groove; Hensen's node; blastodisc; dorsal lip of the blastopore

Question

Quizplus · Accepted Answer

In the developing frog, the primitive groove and Hensen's node perform functions equivalent to those of the primitive streak and node, respectively, in the developing chick. Similarly, the blastopore and dorsal lip of the blastopore in the frog are equivalent to the blastopore and dorsal lip of the blastopore in the chick. Therefore, the best choice is B. The other choices are either incorrect or have inaccurate equivalencies.

In the Developing Chick, the _______ and _______ Perform Functions

In the Developing Chick, the _ and _ Perform Functions