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Which of the following pairs are correctly matched? Animals - Morphological features (i) Crocodile - 4-chambered heart (ii) Sea urchin - Parapodia (iii) Obelia - Thecodont (iv) Lemur - Thecodont

1. (a) (ii), (iii) and (iv)
2. (b) only (i) and (iv)
3. (c) only (i) and (ii)
4. (d) (i), (iii) and (iv)

Correct answer: (b) only (i) and (iv)

Solution

Crocodiles are reptiles with a 4-chambered heart, and lemurs are primates with thecodont dentition. Sea urchins do not have parapodia, and Obelia is a cnidarian, not a thecodont animal.

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