the organization of life

1. atom

1.1. molecule

1.1.1. micro-molecule

1.1.1.1. cells

1.1.1.1.1. the smallest structural and functioning unit of an organism

1.1.1.1.2. tissues

1.1.1.2. organelles

1.1.1.2.1. the number of organized or specialized cells in a living cell.

1.1.1.3. a molecule containing very many atoms.

1.1.2. the smallest part of something that can take place in a chemical reaction

1.2. these things are the smallest thing in the universe