levels of organization for life

1. organism

2. organ system

3. organs

4. tissues

4.1. they have to be similar cells and complete the similar job .

5. cells

5.1. smallest units that have characteristics of life .

5.1.1. 100 trillion cells in the human body .

5.1.1.1. cells are the smallest unit .

6. organelles

6.1. tiny structures inside of a cell .

6.1.1. can not live outside cells .

6.1.1.1. examples , mitochondria , ribosome , vacuole .

7. macromolecule

7.1. it has more than 1 more bonding molecule.

8. molecule

8.1. comes together to form macromolecules .

8.1.1. it has two bonding elements

9. atoms