Question

Choose a pair of statements which are true about gymnophiona.
(A) Skin contains minute dermal scales
(B) Teeth are absent on both jaws
(C) Vertebrae are numerous and amphicoleus
(D) Fertilization is external

• A. B and C
• B. B and D
• C. A and B
• D. A and C

Answer 1

The correct option is D A and C

Gymnophiona, also called Apoda, is one of the three major orders of the class Amphibia. Its members are known as caecilians. The majority of this group of limbless, wormlike amphibians live underground in humid tropical regions throughout the world. Their skin is smooth and usually dark-matte, but some species have colorful skins. Inside the skin are calcite scales. The skin also has numerous ring-shaped folds, or annuli, that partially encircle the body, giving them a segmented appearance. The amphicoelous vertebra has a concave depression at either end. Amphicoelous vertebrae are found in fishes apoda and some urodela.