Components of nucleus are

Karyotheca, nucleolus, chromatin and nucleoplasm

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Nuclear envelope, nucleolus

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Nuclear envelope, nucleoplasm and chromatin

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All the above.

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Solution

The correct option is D Karyotheca, nucleolus, chromatin and nucleoplasm
The main components of the nucleus are-
1) Nucleolemma or nuclear membrane or karyotheca- is a limiting membrane that separates the nucleus from the cytoplasm and transports important material between the nucleus and cytoplasm.
2) Nucleolus is a spherical dark structure present inside the nucleus
3) Chromatin is genetic material made of DNA and histone protein
4) Nuclear matrix or nucleoplasm is semifluid homogenous substance
Hence the correct option is A.

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