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