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