NEET 2013 · Class 11

Biological Classification

Specialized cells for fixing atmospheric nitrogen in Nostoc are

  1. (A)heterocysts
  2. (B)hormogonia
  3. (C)nodules
  4. (D)akinetes

The NCERT line that answers it

Verbatim line

Some of these organisms can fix atmospheric nitrogen in specialised cells called **heterocysts**, e.g., *Nostoc* and *Anabaena*.

Chapter
Biological Classification
Section
2.1.2 Eubacteria
Page
3
Words matched
17 of 17

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=0.9851, combined=0.9911). Verified: high — The span explicitly states that Nostoc fixes atmospheric nitrogen in specialized cells called heterocysts, which directly matches the question and distinguishes heterocysts from the other options.

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