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Earn 100

The nerve cord of chordates is:
(a)Single, solid, tubular and non-ganglionated
(b)Double, hollow, tubular and non-ganglionated
(c)Single, hollow, tubular and ganglionated
(d)Single, hollow, tubular and non-ganglionated

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Important Questions on Phylum Chordata
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Ascidia belongs to the subphylum_____

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The first tetrapod vertebrates are descended from .

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Birds are glorified reptiles, because the birds evolved from the reptiles, and also they share the characters with reptiles?

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Match the following correctly related to cartilaginous fishes ?
Column I | Column II | ||
(i) | Sphyma | (a) | Sting ray |
(ii) | Torpedo | (b) | Dog fish |
(iii) | Trygon | (c) | Saw fish |
(iv) | Pristis | (d) | Electric ray |
(v) | Scoliodon | (e) | Hammer headed shark |

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In Deuterostomia embryonic blastopore produces _____

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The protochordate that doesn't have heart, respiratory pigment, blood corpuscles but performs respiration through the external body surface is _______

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Urinary bladder is absent in _________

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In the given diagram of the typical chordate. Identify the parts labelled as and select the correct option?
