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๐ฌ
๐งฌ Biology
Cell โ Unit of Life
All living things are made of cells; discovered by Robert Hooke in 1665; prokaryotic vs eukaryotic
England ๐ฌ๐ง 1665 Biology
Key Facts
- 1
Robert Hooke (1665) first described cells in cork; Leeuwenhoek first saw living cells in water
- 2
Prokaryotes (bacteria, archaea): no nucleus; Eukaryotes (plants, animals, fungi): membrane-bound nucleus
- 3
Organelles: nucleus (DNA), mitochondria (energy), ribosomes (protein synthesis), chloroplasts (in plants)
๐ฌ Did you know? The smallest bacterium (Mycoplasma genitalium) has 473 genes; a human cell has ~20,000 genes โ yet bacteria were the first life on Earth 3.5 billion years ago
Quick Reference
Category
Biology
Country
๐ฌ๐ง England
Year / Era
1665
About
All living things are made of cells