1. Organelles
1.1. Specialized cellular structure
1.1.1. Have no bacterial cells
1.1.1.1. They can be a Nucleus
2. Atom
2.1. Can Form Together
2.1.1. Composed of Protons, neutrons, and electrons
2.1.1.1. Smallest piece of matter
3. Molecule
3.1. Electrical group of two atoms
3.1.1. Held together by chemical bonds
3.1.1.1. They make up solids, liquids, and gasses, such as common table salt, table sugar, water ice, frozen carbon dioxide (dry ice), glass, rock, most metals, and wood.
4. Macromolecule
4.1. A very large molecule
4.1.1. Composes of thousands of atoms
4.1.1.1. They form carbohydrates and many other things.
5. Cells
5.1. Smallest unit of life
5.1.1. Building blocks of life
5.1.1.1. Contain many biomolecules
6. Tissues
6.1. An ensemble of similar cells
6.1.1. Carry out a specific function
6.1.1.1. The cells that are in it are from the same origin
7. Organs
7.1. A collection of tissues
7.1.1. Tissues in it have same functions to that of the other tissues in the organ.
7.1.1.1. Mamlas rely on these to live
8. Organism
8.1. Can me multicellular
8.1.1. Can be unicellular
8.1.1.1. All organisms are capable of reproduction and growth