Cell Theory

What is one of the three parts of the cell theory?

• All cells are made of atoms

• All organisms are composed of one or more cells

• Cells can create energy

• Cells are the smallest living things

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Who is credited with creating the first compound microscope?

• Robert Hooke

• Anton van Leeuwenhoek

• Zacharias Janssen

• Rudolph Virchow

What did Anton van Leeuwenhoek discover by looking at dental scrapings?

• Viruses

• Animalcules (bacteria)

• Plant cells

• Red blood cells

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What term did Robert Hooke coin while studying cork?

• Bacteria

• Microscopy

• The cell

• Organism

Which scientist concluded that all plants are made of cells?

• Theodor Schwann

• Matthias Schleiden

• Robert Hooke

• Rudolph Virchow

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Who argued that cells come from preexisting cells?

• Matthias Schleiden

• Anton van Leeuwenhoek

• Robert Hooke

• Rudolph Virchow

What did Schleiden mistakenly believe about the formation of cells?

• They come from preexisting cells

• They are made of atoms

• They come from free-cell formation

• They are created in laboratories

Which scientist's research was controversially borrowed by Rudolph Virchow?

• Zacharias Janssen

• Robert Remak

What is the main focus of the video?

• The life cycle of plants

• Differences between unicellular and multicellular organisms

• The structure of cells

• The importance of water in biology

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What defines a unicellular organism?

• It is made up of multiple cells.

• It is made up of a single cell.

• It can only reproduce asexually.

• It cannot respond to its environment.

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