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NEET2018BotanyMineral NutritionActual

In Aulosira, Tolypothrix and Nostoc,

Options

  1. Avesicles
  2. Barbuscles
  3. Cakinetes
  4. Dheterocysts

Correct answer

D. heterocysts

Step-by-step solution

Many cyanobacteria are free living and filamentous such as Aulosira, Tolypothrix, Nostoc, etc. These cyanobacteria have some specialised and colourless cells, called heterocysts which are the sites of nitrogen fixation.

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