Question

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Define the following :-

1. Cell wall

2. Nucleus

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Answer 1

Answer:

Hello❤❇!!

Cell wall:

✍ It is rigid,semi elastic ,semi transparent, supportive and protective but permeable covering present outside the plasma membrane in plant cells,fungi,some protests and prokaryotes.

Nucleus:

✍Nucleus is a dense protoplasmic body that contains hereditary information for controlling cell activities as well as transfer to next generation.

Thanks ❤!!

Answer 2

Answer :-

Cell wall :

•Cell wall is present only in plant and bacterial cells but absent in animal cells.

•It is a rigid, thick and non-living protective layer present outside the cell membrane.

•It provides definite shape to the cell and protects the cell against internal or external pressure and mechanical injury.

Nucleus :

•It is a portion of Protoplasm which is deeply stained and with maximum density.

•It is a double layered membrane.

•Nucleus is present in all type of cells accept mature RBC of mammals.

•Nucleus has four components - Nuclear membrane, Nuclear reticulum, Nucleolus and Nucleoplasm.