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Nucleus contain
👉Nuclear membrane
👉DNA
👉Chromatin material
👉Nucleoid
👉Prokaryotic cells
👉Eukaryotic cells

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The nucleus has a double layered covering called Nuclear membrane. The Nuclear membrane has pores which allows the transfer of materials from inside the nucleus to its outside to the cytoplasm.

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👉Rod shaped structures
👉Contain information necessary for inheritance of features from parents to next generation in the form of DNA.
👉DNA:
🖊️Deoxyribonucleic acid
🖊️Contains information necessary for constructing and organising cells.
🖊️Functional segment of DNA are called genes.

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👉Presence of cytoplasmic organelles.
👉The chlorophyll in photosynthesis is with plastics.
👉They are complicated structures.

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👉In a cell which is not dividing, this DNA is present as part of Chromatin material.
👉Visible as entangled mass of thread like structures.
👉Whenever the cell is about to divide, the chromatin material gets organised into chromosome.

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An undefined nuclear region containing only nucleic acids is called a Nucleoid.

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👉Absence of cytoplasmic organelles.
👉The chlorophyll in photosynthesis is associated with membranous vesicles.
👉They have simple structure.