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Organisms and Populations — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations1 Mark
MCQ
For question two statements are given $-$ one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below.
Assertion : Mycorrhizal relation exists between Boletus and Pinus.
Reason : It is a symbiotic interaction.
  • A
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • ✓
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    Assertion is true but reason is false.
  • D
    Both assertion and reason are false.
✓

Answer

Correct option: B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Mycorrhiza is a mutualistic or symbiotic interaction in which a fungus $($e.g. Boletus$)$ and a root of plant $($ e.g. Pinus$)$ are involved.
The root provides food and shelter to the fungus.
The fungus helps the plant in solubilisation and absorption of minerals, water uptake and protection against pathogenic fungi.

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