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Rough endoplasmic reticulum looks rough because of attached:
ARotifers
BRibosomes
CRhizoids
DRootlets
Answer & Solution
Correct answer: B. Ribosomes
1. These particles sit on its outer surface.
2. They are present in all active cells.
3. They are ribosomes.
_Source: NCERT Class 9 Science, Ch 5 'The Fundamental Unit of Life'_
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