NEET 1989 · Class 11

Biological Classification

The relation between algae and fungi in a lichen is

  1. (A)symbiosis
  2. (B)parasitism
  3. (C)commensalism
  4. (D)protocooperation

The NCERT line that answers it

Verbatim line

Lichens are symbiotic associations i.e. mutually useful associations, between algae and fungi.

Chapter
Biological Classification
Section
2.6 VIRUSES, VIROIDS, PRIONS AND LICHENS
Page
11
Words matched
30 of 30

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

How this line gives the answer

0, emb=0.9785, combined=0.9871). Verified: high — The span explicitly states 'Lichens are symbiotic associations i.e. mutually useful associations, between algae and fungi,' which directly and conclusively identifies the relationship as symbiosis, distinguishing it from parasitism, commensalism, and protocooperation.

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Question text is reproduced from the published NEET 1989 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.