Question

what is cell ?.... .

Answer 1

The smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm anda nucleous enclosed in a membrane is known as cell.

hope it helps u.. mark me a brainliest :-)

Answer 2

$Here \: is \: the \: answer \: of \: your \: quesstion$

`$\textbf{Cell}$`

→ Cells are the structural and functional unit of life.

All living organisms are made up of cell. That's why cell is known as structural unit of life.

A single cell can perform all life functions with the help of it's components. Therefore it is known as functional unit of life.

→ Robert Hooke first discovered the cell in 1665.

He prepared a thin slice of cork and observed it under self made microscope. He saw some box like structures which he named as cell.

→ Cells can replicate independently.

→ It contain hereditary information due to presence of nucleus or nucleoid.

→ Cells size ranges from 1 - 100 μm.

→ All organisms are made up of cells. Organisms with single cells are known as unicellular organisms. And organisms with multiple cells are known as multicellular organisms.

→ Anton Von Leeuwenhoek first saw the living cell and also first describe the living cell.

→ Mycoplasmas, is the shortest cell (0.3 μm) and ostrich egg and nerve cells are the largest cell.

→ Cells are in different shapes. Their shape vary with their function. They may be cuboid, thread like, disc like etc.

→ Cells are of two types namely; Eukaryotic an Prokayotic cells.

a) Eukaryotic cells :-

* These are generally large in size.

* Nuclear region is well defined and surrounded by a nuclear membrane.

* Member bound cell organelles are present.

* DNA is linear.

* Ex :- humans and plants.

b) Prokayotic cells :-

* These are smaller in size.

* Nuclear region is not well defined and not surrounded by a nuclear membrane.

* Membrane bound cell organelles are absent.

* DNA is circular.

* Ex :- Bacteria, blue green algae etc.
_________________________________