Question

Study the following statements about chordate.

A) Columella auris present in the middle ear of amphibians is modified hyomandibula of fishes.

B) Reptiles lay cledoic egg.

C) Sphenodon is a connecting link between amphibians and reptiles.

D) Panthera tigris is an extinct animal of India.
From the above identify the incorrect statement or statements.

• A. A, C
• B. Only A
• C. Only D
• D. B, C

Answer 1

Answer: (C)

Only D

Chordate belongs to the phylum Chordata. They possess a notochord. Primitive amphibians resembles the lungs fishes. They have only one ear ossicle present which is called as Columella auris. It is modified hyomandibula of fishes. It is present in the middle ear. Birds and reptiles lay cleidoic eggs. These eggs have a protective shell and are laid out of water. It contains food required by the embryo for hatching. Sphenodon is a living fossil lizard. It is a connecting link between amphibians and reptiles. The Tiger (Panthera Tigris) is the national animal of India. It is an endangered animal of India. It is at high risk of being extinct.

Thus, the correct answer is option C.