Cell Theory and Key Scientists

What did Robert Hooke observe under his microscope in 1665?

• Bacteria

• Cork

• Pond water

• Animal tissues

Which scientist discovered single-celled organisms in pond water?

• Theodor Schwann

• Rudolf Virchow

• Anton van Leeuwenhoek

• Matthias Schleiden

What did Anton van Leeuwenhoek call the single-celled organisms he discovered?

• Cells

• Animalcules

• Cytoblasts

• Microorganisms

What did Robert Hooke's observations remind him of?

• Animalcules

• Small rooms or "cells"

• Cytoblasts

• Microscopic organisms

What did Anton van Leeuwenhoek discover in 1674?

• The cell nucleus

• Single-celled organisms

• The first principle of cell theory

• The term "cell"

What did Theodor Schwann publish in 1839?

• His discovery of bacteria

• His conclusion that all animal tissues are composed of cells

• His microscope-making techniques

• His detailed drawings in "Micrographia"

What did Theodor Schwann and Matthias Schleiden's proposal lead to?

• The discovery of bacteria

• The first two principles of cell theory

• The term "cell"

• The importance of the cell nucleus

How many new cells does your body create every second?

• Hundreds

• Thousands

• Millions

• Billions

What is NOT a part of cell theory:

• all cells come from existing cells

• all cells have a nucleus

• all living things are made of cells

• cells are basic unit of structure and function in living things

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