Question

Define unicellular and multicellular organisms

Answer 1

Organisms with single cell are known as unicellular organisms.

For eg: Amoeba.

Organisms with multiple cells are known as multicellular organisms.

For eg : Elephant.

Answer 2

$\bold{Unicellular\:organisms:-}$

The organisms that are made up of only single cell and performs all the activities by its single cell only are known as unicellular organisms.

For example:- Bacteria, paramecium etc.

$\bold{Multicellular\:organisms:-}$

Many cells are grouped together to perform different functions in the body and also forms various body parts.