Cell Theory

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CELL​

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Theory

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​1. All living things are made of cells.

​2. Cells are the smallest unit of life.

​3. All cells come from pre-existing cells.

​1665 – Robert Hooke: First to observe cells through a rudimentary microscope. He observed cork cells, and coined the term “cells."

​*Hooke May have looked like this, but we aren't sure!

​1674 – Anton von Leewenhoek Observed the first living cells in teeth scrapings pond water. He called them “wee beasties" and animalcules.

​1838 – Mattias Schleiden Botanist (studied plants) who concluded that all plants and plant parts are made of cells. 

​1839 – Theodor Schwann Zoologist (studied animals) who conclude that all animals are made of cells.

​1855 – Rudolph Virchow After looking at many different types of cells, he concluded that all cells come from pre-existing cells. 

​** If you run out of room, please use the back of your paper!

​1970 – Lynn Margulis Developed Endosymbiotic Theory. This is the idea that complex eukaryotes evolved when larger prokaryotes engulfed smaller prokaryotes. The two then formed a mutually beneficial relationship that led to a new organism.

​Endosymbiotic Theory Continued:

The major supporting evidence = mitochondria and chloroplasts have their own DNA and reproduce independently. 

​If you need to access any notes that you missed, please check on Schoology in today's folder.

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​If you have time remaining, please review your stems for your quiz tomorrow!