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Phasmids and Amphids are important structures in nematodes that act as…….

Question: Phasmids and Amphids are important structures in nematodes that act as…….

Options:

Respiratory organs
Reproductive organs
Mechanoreceptors
Chemosensory organs

✅Explanation:
Amphids and phasmids are paired lateral sensory organs located in the head (amphids) and tail (phasmids) regions of nematodes. They are crucial for the nematode's perception of its environment, helping them detect chemicals, including food sources, pheromones, and other environmental cues.
Chemosensory organs are specialized structures that enable organisms to detect and respond to chemical stimuli in their surroundings.

🔑Key Points:
(a) Respiratory organs: Nematodes lack specialized respiratory organs and primarily exchange gases through their cuticle (outer covering).
(c) Mechanoreceptors: Mechanoreceptors detect physical stimuli like touch and pressure. Although nematodes have mechanoreceptors.

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