Creation of the Cell Theory

In 1838, this German scientist discovered that animals tissue is made of cells.

• Rudolf Virchow

• Matthias Jacob Schleiden

• Theodor Schwann

In 1838, this German scientist discovered that plants tissue is made of cells.

• Rudolf Virchow

• Matthias Jacob Schleiden

• Anton van Leewenhoek

This scientist was from Netherlands. He contributed to the cell theory in 1590. He invented the compound optical microscope.

• Zacharias Janssen

• Robert Hooke

• Anton van Leewenhoek

When the compound optical microscope was invented, years later a scientist improved the miscroscope and observed bacteria and animal cells.

• Rudolf Virchow

• Anton van Leeuwenhoek

• Robert Hooke

After two scientists discovered that plants and animals tissue are made from cells, another scientist stated that: "Cells come from other preexisted cells".

• Rudolf Virchow

• Matthias Jacob Schleiden

• Robert Hooke

In 1665, In United Kingdom, one scientist named the cell base observations on a cork bark.

• Theodor Schwann

• Zacharias Janssen

• Robert Hooke

How were bacteria first discovered?

• Looking at dental scrapings (food remains).

• Studying different types of plants.

• Studying different types animals.

Which is NOT a part of the cell theory?

• All organisms are composed of one or more cells.

• The cells don't come from other cells.

• The cell is the basic unit of structure and organization in organisms.