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Auxospores and hormocysts are formed, respectively, by:

1. Some diatoms and several cyanobacteria
2. Some cyanobacteria and diatoms
3. Several cyanobacteria and several diatoms
4. Several diatoms and a few cyanobacteria

Correct answer: Some diatoms and several cyanobacteria

Solution

Auxospores are characteristic of some diatoms, where they restore cell size after repeated divisions. Hormocysts are formed by several cyanobacteria as specialized resting or reproductive units.

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