Assertion (A): | Members of subphylum vertebrate possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. |
Reason (R): | Thus all chordates are vertebrates but not all vertebrates are chordates |
1. | (A) is True but (R) is False |
2. | (A) is False but (R) is True |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
List-I | List-II | ||
A. | Chondrichthyes | I. | Clarias |
B. | Cyclostomata | II. | Carcharodon |
C. | Osteichthyes | III. | Myxine |
D. | Amphibia | IV. | Ichthyophis |
Assertion (A): | In hemichordates, the body cavity is lined by mesoderm. |
Reason (R): | In aschelminthes, the body cavity is not lined by mesoderm |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
List-I (Biological Name) |
List-II (Common name) |
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A. | Asterias | I. | Sea urchin |
B. | Antedon | II. | Brittle star |
C. | Echinus | III. | Sea lily |
D. | Ophiura | IV. | Star fish |
List I | List II | ||
A. | Pterophyllum | I. | Hag fish |
B. | Myxine | II. | Saw fish |
C. | Pristis | III. | Angel fish |
D. | Exocoetus | IV. | Flying fish |