Introduction To Cells

Cell Theory:

1st Theory: All living things are made up of one or more cells

-All living things have cells

2nd Theory: Cells are the smallest living thing, basic unit of structure and function in living things.

-Cells are alive and they are the smallest living thing.

3rd Theory: Cells are made from other cells.

-Can break apart making more cells.

Characteristics of Living Things:

1. Living things are made up of cells.

Ex: Humans

2. Living things obtain and use energy.

Ex: Plants

3. Living things grow and develop.

Ex: Animals

4. Living things eventually die.

Ex: Humans

5. Living things adapt or respond to their environment.

Ex: Polar Bears

6. Living things get rid of waste.

Ex: Humans and animals