A unicellular organism is a plant and a multicellular organism is a human.

A unicellular organism has one purpose- to survive.  A multicellular organism has many cells working together to keep the organism alive.

A multicellular organism is simple and a unicellular organism is complex.

A unicellular organism can only be found in certain biomes but a multicellular organism can be found anywhere on Earth.

An animal is made up of only one cell and an amoeba is made of many cells.

An animal is found on land and an amoeba is found in water.

An amoeba is single-celled and an animal is multicellular.

An animal is a living organism and an amoeba is a non living organism

bird

cricket

snake

bacteria

They do not need any substance from outside of the cell.

They are able to perform all necessary functions within one cell. 

They do not need to perform more than one function to survive.

They can't survive without other cells.

amoeba

bacteria

worm

fungi

reproduce

specialize

get rid of waste

use energy

Both fungi and bacteria are large organisms.

Both fungi and bacteria can carry out all life functions in their one cell.

Both fungi and bacteria need sunlight and nutrients from the soil to be able to grow.

Both fungi and bacteria are highly specialized to do only one job so they must work with other cells to obtain food.

The fish would increase in size.

The fish would decrease in size.

The fish would die.

The fish would grow and thrive.

bacteria 

amoeba

fungi

nerve cell

Bacteria borrow cells from the host to carry out life processes.

Bacteria use their many different cells to carry out life processes.

Bacteria are made up of one cell which is responsible for carrying out all life processes.

Bacteria use their many different cells as well as cells from the host to carry out life processes.