Parapodia used for locomotion in the aquatic annelid Nereis are best described as
A{'text': 'Cilia on comb plates', 'label': 'A'}
B{'text': 'Jointed articulated legs', 'label': 'B'}
C{'text': 'Lateral fleshy appendages', 'label': 'C'}
D{'text': 'Muscular pseudopodia', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'Lateral fleshy appendages', 'label': 'C'}
1. Nereis is an aquatic (marine) annelid.
2. It possesses lateral fleshy outgrowths called parapodia, one pair per segment.
3. Parapodia beat rhythmically to help the animal swim through water.
4. Cilia are found in ctenophores; jointed legs are arthropod features; pseudopodia are amoeboid.
_Source: NCERT Class 11 Biology, Ch 4 "Animal Kingdom", §4.2.6_
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