Question

The structures furcula, urostyle, endostyle are present respectively in

• A. Pavo, rhacophorus, branchistoma
• B. Casuaris, gegeniophis, amphioxus
• C. Apteryx, rana, ascidia
• D. Pavo, proteus, pyrosoma

Answer 1

The correct option is A Pavo, rhacophorus, branchistoma

Furcula or wishbone is a forked bone found in birds (Pavo). It is formed by the fusion of the two clavicles.

Urostyle is the bony rod forming the last segment of the vertebral column of frog, food and related amphibians (Rhacophorus).

Endostyle is a longitudinal ciliated groove on the ventral wall of pharynx which produces mucus to gather food particles. It is found in Urochordate and cephalochordate (Branchiostoma). Hence option A is correct.