Cells & The Cell Theory

The first part of the cell theory is that --

• Sometimes organisms are composed of one or more cells.

• ALL organisms are composed of one or more cells.

Second part of the cell theory is that --

• the cell is the basic unit of structure and organization/life

• the cell is a nonliving unit

The third part of the cell theory is

• We have to make new cells on our own in a lab

• Cells come from pre-existing cells

What did Leeuwenhoek discover when using the microscope that he built? 

• A butterfly.

• Onions.

• The bacteria on his teeth.

What did he call animalcules?

• Bacteria

• Animals

Robert hook discovered the ____ when looking at a cork underneath a microscope because they looked like chambers/small rooms.

• cell theory

• cell

• bacteria

Matthias Schleiden, a botanist, contributed to the cell theory when he discovered that every plant he looked at was --

• made of molecules

• had protons and neutrons

• was made of cells

Theodore Schwann had the schwann cell named after him and while studying animals, he discovered that --

• you could eat animals

• animals were made of cells

• he did not contribute to a cell theory part

Schleiden believed that free cell formation is where cells come from which was proven incorrect. Where do cells actually come from? 

• From pre existing cells

• He is right, they pop up out of no where.

True or False

The cell theory is 1. All living things are made of cells, 2. The cell is the basic unit of life, 3. All cells come from pre existing cells.

• True

• False