Cell death
Cellular respiration
Cell division
Cellular communication
Population
Community
Biosphere
Ecosystem
Proteins
Quarks
Cells
Organelles
92
48
13
11
Aristotle
Captain Hooke
Robert Hooke
James Watson
Nucleus
Golgi Apparatus
Mitochondria
Endoplasmic Reticulum
Smooth Reticulum
Chloroplast
20
200
400
1000
Cellular parts
Organs
Celluoplasts