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