Question

In higher animals blastopore generally forms

• A. Anus
• B. Mouth
• C. Liver
• D. Gut

Answer 1

The correct option is A Anus

Blastopore is an opening in the gastrula through which the communication through the external environment is done. On the basis of the development of blastopore into mouth or anus, the animals are divided into two categories that are the protostomes and deuterostomes.

• Protostomes are the primitive animal that includes Phylum Annelida, Arthropoda and Mollusca in which the blastopore develops into the mouth.
• Deuterostomes are the higher animals that include Echinodermata and the phylum Chordata in which the blastopore develops into the anus first and then the mouth is formed.

So, the correct option is ' Anus'