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Historical Development – Cell Theory

1. Robert Hooke – In 1662, he observed tiny compartments in the cork of a mature tree and gave them the Latin name cellulae (meaning small rooms). This was the origin of the biological term cell.

2. Anton Von Leeuwenhoek - By the late 1600s, he had observed diverse protistans, sperm, even a bacterium – an organism so small it would not be seen again for another two centuries.

3. R.J.H. Dutrochet – French botanist who prepared plant cells and studied them between 1824 and 1830. He discovered and named the phenomenon of osmosis, which is the passage of a liquid through a semi-permeable membrane. He was the first to carefully study respiration and light sensitivity in plants.

4. Robert Brown – In 1827, he noticed the constant presence of an opaque spot in egg cells, pollen cells, and then cells of the growing tissues of orchid plants and called this spot protozoa in 1834.

5. Dujardin – He discovered one –celled animals called rhizopoda,......

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Approximate Word Count: 481
Approximate Pages: 2 (250 words per double-spaced page)

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