Who first observed and named 'cells' by studying cork slices?

• Robert Hooke

• Anton Van Leeuwenhoek

• Mattias Schleiden

• Theodore Schwann

What did Anton Van Leeuwenhoek call the tiny organisms he observed in pond water?

• Animalcules

• Cells

• Microbes

• Bacteria

Which scientist concluded that all plants are composed of cells?

• Mattias Schleiden

• Theodore Schwann

• Rudolph Virchow

• Robert Hooke

What principle did Rudolph Virchow add to the cell theory?

• All cells come from pre-existing cells

• Cells are the basic unit of life

• All living things are made of cells

• Cells contain a nucleus

What is one of the main principles of the modern cell theory?

• All living things are made of one or more cells.

• Cells are the largest unit of life.

• All cells have the same components or parts within them.

• All cells contain a nucleus.

What did Theodore Schwann discover about animal tissues?

• He observed that animal tissues are identical to plant cells.

• He discovered that animal tissues are made of non-living material.

• • He concluded that all animal tissues are made up of cells.

• He observed that animal tissues are made of fluids, not cells.