Explanation:
C
Phylum Chordata belongs to the Kingdom Animalia and includes all the vertebrates.
Characteristics of phylum Chordata :
(1) Notochord : It support the nerve chord of replaced by vertebral column after the embryonic state in all vertebrates.
(2) Dorsal hollow nerve chord : It is a bundle of nerves running along the back.
(3) Pharyngeal slits : They are the openings which allow the entry of water through the mouth without enterning the digestive system. They connect mouth and throat.
771.
Match the following
| Group | | Types of vertebrae |
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A. | Pisces | I. | Amphiplatyon |
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B. | Reptilia | II. | Procoelous |
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C. | Aves | III. | Opisthocoelous |
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D. | Mammalia | IV. | Amphicoelous |
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| | V. | Heterocoelous |
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The correct match is:
(a) A - IV, B - II, C - V, D - I
(b) A - I, B - V, C - II, D - IV
(c) A - III, B - II, C - IV, D - I
(d) A - IV, B - V, C - III, D - I
Ans. (a) :
| Group | Type of vertebrae |
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A. | Pisces | Amphicoelous |
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B. | Reptilia | Procoelous |
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C. | Aves | Hetreocoelous |
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D. | Mammalia | Amphiplatyon |
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