NEET UG 2020 — Animal Kingdom

Which of the following statements are true for the phylum-Chordata? (a) In Urochordata, notochord extends from head to tail, and it is present throughout their life. (b) In Vertebrata, the notochord is present during the embryonic period only. (c) Central nervous system is dorsal and hollow. (d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata, and Cephalochordata.

Bilaterally symmetrical and acoelomate animals are exemplified by

Match the following group of organisms with their respective distinctive characteristics and select the correct option: <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">Organisms</td><td colspan="2" rowspan="1">Characteristics</td></tr><tr><td>(a)</td><td>Platyhelminthes</td><td>(i)</td><td>Cylindrical body with no segmentation</td></tr><tr><td>(b)</td><td>Echinoderms</td><td>(ii)</td><td>Warm-blooded animals with direct development</td></tr><tr><td>(c)</td><td>Hemichordates</td><td>(iii)</td><td>Bilateral symmetry with incomplete digestive system</td></tr><tr><td>(d)</td><td>Aves</td><td>(iv)</td><td>Radial symmetry with indirect development</td></tr></tbody></table>

All vertebrates are chordates but all chordates are not vertebrates, why?

Match the following columns and select the correct option. <table class="pyq-table"><tbody><tr><td></td><td>Column-I</td><td></td><td>Column-II</td></tr><tr><td>(a)</td><td>Gregarious, polyphagous pest</td><td>(i)</td><td>Asterias</td></tr><tr><td>(b)</td><td>Adult with radial symmetry and larva with bilateral symmetry</td><td>(ii)</td><td>Scorpion</td></tr><tr><td>(c)</td><td>Book lungs</td><td>(iii)</td><td>Ctenoplana</td></tr><tr><td>(d)</td><td>Bioluminescence</td><td>(iv)</td><td>Locusta</td></tr></tbody></table>

Match the following columns and select the correct option:- <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">Column-I</td><td colspan="2" rowspan="1">Column-II</td></tr><tr><td>(a)</td><td>Aptenodytes</td><td>(i)</td><td>Flying fox</td></tr><tr><td>(b)</td><td>Pteropus</td><td>(ii)</td><td>Angel fish</td></tr><tr><td>(c)</td><td>Pterophyllum</td><td>(iii)</td><td>Lamprey</td></tr><tr><td>(d)</td><td>Petromyzon</td><td>(iv)</td><td>Penguin</td></tr></tbody></table>

Which of the following options does correctly represent the characteristic features of phylum Annelida?

Which of the following has notochord throughout life?