Question

Which of the following is a chordate feature, not
shared by the non-chordates ?
(a) Metamerism (b) Axial organization
(c) Bilateral symmetry (d) Pharyngeal gill slits

Answer 1

Answer:

Axial organization

Please mark as brainlost

Answer 2

(d) Pharyngeal gill slits

Explanation:

The presence of notochord, a nerve cord (central nervous system is dorsal, hollow and single) and paired pharyngeal gill slits are the fundamental characters found in phylum chordata. Aniamals belonging to phylum chordata have a post anal tail and a closed circulatory system. Notochord, pharyngeal gill slits and post anal tail is absent in non-chordate animals. In non-chordates, central nervous system is ventral, solid and double.