Cells and Cell Theory

Question 1

How can we tell if something is living?

Answer 1

1. Movement
2. Growth
3. Reproduction
4. Metabolism
5. Evolution
6. Ecology
7. Limited lifespan
8. Has cells

Question 2

Francesco Redi

Answer 2

• Designed a scientific experiment to test the spontaneous creation of maggots by placing fresh meat in each of 2 different jars.
• He discovered that maggots formed in an open jar, but not a gauze-covered or fully closed one.

Question 3

Louis Pasteur

Answer 3

• Created/discovered pasteurization
• Discovered that the spoilage of liquid was caused by particles in the air rather than the air itself

Question 4

Robert Hooke

Answer 4

• 1665
• Examined thin slices of cork under a microscope
• Found cells, but since they weren’t alive, they were just boxes with nothing inside

Question 5

Anton van Leeuwenhoek

Answer 5

• 1665
• Was looking at living cells
• Found organisms in pond water and looked at human blood cells

Question 6

Robert Brown

Answer 6

• 1820
• Observed that there was a small, dense, round body that was common to all plants (called it the nucleus)

Question 7

Matthias Schleiden

Answer 7

• 1838
• Concluded that all plants are made up of cells

Question 8

Theodor Schwann

Answer 8

• 1839
• Concluded that all animals are made up of cells

Question 9

Cell Theory

Answer 9

1. All living organisms are made up of cells
2. Cells are the basic unit of structure and function in living organisms
   
   • They are also the smallest
     living structure that can
     function independently
3. All cells come from pre-existing cells