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An outer covering membrane is absent overA. nucleolusB. lysosomeC. mitochondrionD. plastids |
Answer» Correct Answer - A Nucleolus was discovered by Fontana (1 781) and named by Bowman (1840) is a naked roughly rounded darkly stained structure . It is attached to chromatin at specific spot called nucleolar organiser region or NOR . Nucleolus constitute 35% mass of nucleus and is the largest part of nucleus. |
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