Home Biology Organisms and Populations Skill Builder A teacher explaining physical contact leadin…
Biology Organisms and Populations Skill Builder Single Correct MCQ
Published on: August 11, 2026

A teacher explaining physical contact leading to equal physiological dependence between two thalloid forms was telling about

A
Mycorrhizal association
B
Establishment of heterothallism
C
Operation of heterothallism
D
Advent of lichen formation

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The correct answer is:
D

The teacher was explaining the advent of lichen formation. Lichens represent an intimate mutualistic relationship between a fungus and photosynthesising algae or cyanobacteria.

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