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