Classification of Animal Kingdom MCQs for NEET — Zoology Questions with Answers

The text states: 'A still higher level of organisation, i.e., organ level is exhibited by members of Platyhelminthes and other higher phyla where tissues are grouped together to form organs, each specialised for a particular function.' Aschelminthes are considered a 'higher phyla' than sponges and coelenterates and exhibit organ-system level, but among the given options, Platyhelminthes is the first to show organ level.

The NCERT summary states: 'Aschelminthes are pseudocoelomates and include parasitic as well as non-parasitic roundworms.' This is a defining characteristic of the phylum. Suckers and hooks are characteristic of parasitic Platyhelminthes, metameric segmentation is for Annelida, and calcareous shell for Mollusca.

The NCERT summary explicitly states: 'Aschelminthes are pseudocoelomates and include parasitic as well as non-parasitic roundworms.'

Hemichordates are bilaterally symmetrical as adults; the others are radial.

Anal styles are present only in male cockroaches.

Hair, pinna (external ear), and mammary glands are unique to mammals.

Chordates: dorsal HOLLOW SINGLE nerve cord (A wrong), ventral heart (D wrong), coelomate (E wrong). B and C correct.

Pleurobrachia — Ctenophora; Radula — Mollusca; Stomochord — Hemichordata; Air bladder — Osteichthyes.

Pterophyllum — angel fish; Myxine — hag fish; Pristis — saw fish; Exocoetus — flying fish.

Annelids — true coelomates (correct). Poriferans — acoelomates; Aschelminthes — pseudocoelomates; Platyhelminthes — acoelomates.