Class 11 Biology Biological Classification Viruses, Viroids, Prions and Lichens

Medium

Lichens are ecologically important as they

A
Purify air
B
Are pioneers of barren rocks
C
Are symbionts of algae and fungi
D
Are associated with mycorrhizal roots

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Class 11 Questions

Class 11

Biology Questions

Chapter

Biological Classification

Subtopic

Viruses, Viroids, Prions and Lichens

Similar Questions

Assertion $A$: Viruses are considered as a link between living and non-living organisms.
Reason $R$: Viruses are non-living,but they are obligate parasites in living cells.
Which option is correct for Assertion $A$ and Reason $R$?

Easy

$A$ : Viroids are not included in the five-kingdom system.
$R$ : They are non-cellular.

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Who discovered viroids?

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Host specificity is a:

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Tobacco Mosaic Virus $(TMV)$ genes are

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