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AIIMS 201826 May
Exam
AIIMS
Year
2018
Date
26 May
Subject
Botany
Chapter
Mineral Nutrition

AIIMS 2018 · 26 May · Botany · Mineral Nutrition

In Aulosira, Tolypothrix and Nostoc,

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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