Saved Roughly half of the diversity in Phylum Chordata belongs to ray-finned fishes (clade Actinopterygii). Which of the following classifications best categorizes the remaining half of diversity in Phylum Chordata? (Answer using Chapter 32 in your Freeman textbook or ebook)

a. Amniotes

b. Sarcopterygians

c. Gnathostomes

d. Tetrapods

Option D

Explanation:

Tetrapods are usually classified as four limbed but includes all groups of vertebra living on land and some that have aquatic adaptability for survival in water. This animals include amphibians, reptiles, birds, mammals, sea turtles, sea lions. Strapless are known to have evolved from fined organisms that lived in water.

d. Tetrapods.

Explanation:

The Tetrapods are four limbed animal which contains extincts of mammal, reptile and amphibian. They belong to Phylum chordata. Tetrapods includes land living vertebrates such as frogs, harks, sea lions etc. To be categorized in phylum Chordata the the chordate should possess pharyngeal slits, post tail and dorsal nerve chord.