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