Question

1. what part of the rotifer is responsible for crushing food?

toe
trophi
foot
cilia

Explanation:

To solve this, we analyze each option:

• Toe: Not a part for crushing food in rotifers.
• Trophi: The trophi in rotifers are jaw - like structures in the mastax (a part of the digestive system) that are responsible for grinding or crushing food.
• Foot: Used for attachment or movement, not food crushing.
• Cilia: Used for movement or creating water currents to bring food, not crushing.

Answer:

B. trophi