Practice question

MCQ

Question

A freshwater protist has no cell wall, possesses a flexible protein-rich covering and has one short and one long flagellum. How will it behave when sunlight is unavailable?

Options

Choose one · Correct answer highlighted

It will prey on smaller organisms as a heterotroph. Correct It will form fruiting bodies bearing spores. It will fix atmospheric nitrogen in heterocysts. It will produce basidiospores.

Explanation

The described organism is a euglenoid. Euglenoids have a flexible pellicle and two unequal flagella. They photosynthesise in sunlight but behave as heterotrophs by preying on smaller organisms when sunlight is unavailable.

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