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All vertebrates are chordates but all chordates are not vertebrates, why?
(a)Notochord is replaced by vertebral column in adult of some chordates.
(b)Ventral hollow nerve cord remains throughout life in some chordates.
(c)All chordates possess vertebral column.
(d)All chordates possess notochord throughout their life.

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Important Questions on Animal Kingdom
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Bilaterally symmetrical and acoelomate animals are exemplified by

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Match the following columns and select the correct option.
Column-I | Column-II | ||
(a) | Gregarious, polyphagous pest | (i) | Asterias |
(b) | Adult with radial symmetry and larva with bilateral symmetry | (ii) | Scorpion |
(c) | Book lungs | (iii) | Ctenoplana |
(d) | Bioluminescence | (iv) | Locusta |

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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.

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Match the following columns and select the correct option.
Column-I | Column-II | ||
(a) | 6-15 pairs of gill slits | (i) | Trygon |
(b) | Heterocercal caudal fin | (ii) | Cyclostomes |
(c) | Air Bladder | (iii) | Chondrichthyes |
(d) | Poison sting | (iv) | Osteichthyes |

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Match the following organisms with their respective characteristics:
Column – I | Column – II | ||
---|---|---|---|
Pila | Flame cells | ||
Bombyx | Comb plates | ||
Pleurobrachia | Radula | ||
Taenia | Malpighian tubules |
Select the correct option from the following:

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Consider following features:
- Organ system level of organisation
- Bilateral symmetry
- True coelomates with segmentation of body.
Select the correct option of animal group which possess all the above characteristics:

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Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system

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Which of the following animals does not undergo metamorphosis?
