Animal Kingdom Question 343
Question: What is characteristic of deuterostomes
[DPMT 2001]
Options:
A) Spiral cleavage, blastopore becoming mouth
B) Radial cleavage, blastopore becoming anus
C) Spiral cleavage, blastopore becoming anus
D) Radial cleavage, blastopore becoming mouth
Show Answer
Answer:
Correct Answer: B
Solution:
Radial cleavage, blastophore becoming anus. ∙ Radial pattern of embryonic cleavage. Ex- phoromids, chaetognaths, chordaes excepting sea squirts. ∙ Blastopore becomes the adult anus and then the formation of mouth takes place from a second opening on the dorsal surface of the embryo.
BETA
