Locomotion in diatoms is carried out with the help of__________?
Correct answer: B. Raphe
- A. Valve
- B. Raphe
- C. Pseudopodium
- D. Cilia or flagella
Explanation
Many diatoms move by secreting mucilage through a longitudinal slit called the raphe; the mucilage provides the traction for gliding. Students may choose cilia or flagella because these structures produce movement in many unicellular organisms, but typical diatoms lack them and use the raphe instead.
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