Question

In frog, blastopore normally develops into

• A. Anus
• B. Mouth
• C. Both A and B
• D. None of the above

Answer 1

The correct option is A Anus

Protostome and deuterostome development often differ in the fate of the blastopore, the indentation that during gastrulation leads to the formation of the archenteron. After the archenteron develops, in most animals a second opening forms at the opposite end of the gastrula. Ultimately, the blastopore and this second opening become the two openings of the digestive tube (the mouth and the anus). In protostome development, the mouth generally develops from the first opening, the blastopore, and it is for this characteristic that the term protostome derives (from the Greek protos, first, and stoma, mouth). In deuterostome (from the Greek deuteros, second) development, the mouth is derived from the secondary opening, and the blastopore usually forms the anus example chordates. Frog being a chordate is a deuterostome animal.