Which small, bottle-shaped structure is used by Paramecium for defense?

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Multiple Choice

Which small, bottle-shaped structure is used by Paramecium for defense?

Explanation:
Paramecium relies on specialized extrusive organelles called trichocysts for defense. These are small, bottle-shaped capsules in the cell cortex that rapidly eject a long thread when stimulated. The expelled thread can deter or entangle predators, providing a quick protective response. Other structures serve different roles: contractile vacuoles regulate water balance, cilia are for movement and feeding, and mitochondria generate energy. So the bottle-shaped structure used for defense is the trichocyst.

Paramecium relies on specialized extrusive organelles called trichocysts for defense. These are small, bottle-shaped capsules in the cell cortex that rapidly eject a long thread when stimulated. The expelled thread can deter or entangle predators, providing a quick protective response. Other structures serve different roles: contractile vacuoles regulate water balance, cilia are for movement and feeding, and mitochondria generate energy. So the bottle-shaped structure used for defense is the trichocyst.

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