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