Cell Theory

Which of the following scientists concluded that all animals are made of cells?

• Rudolf Virchow
• Matthais Schleiden
• Robert Hooke
• Theodor Schwann

Which of the following scientists was the first to observe bacteria?

• Anton van Leuwenhoek
• Matthais Schleiden
• Robert Hooke
• Theodor Schwann

Which of the following statements is not part of the cell theory?

• Cells are the basic unit of structure and function in all living things.
• All cells are produced from other cells.
• Only animal cells are composed of cells.
• All living things are composed of cells.

What is one way in which all living things on Earth are alike?

• All living things have hair.
• All living things are made of cells and come from other cells.
• The cells of all living things have chloroplast.
• All living things can move. 

Which statement reflects one of the major components of the cell theory?

• All living things are multi-cellular.
• Organs are the basic unit of structure and function for all living things.
• All cells come from previously existing cells.
• Every organism has a reproductive system to ensure survival of the species.

What structures distinguish a plant cell from an animal cell?

• Plant cells have cell walls and ribosomes.
• Plant cells have cell walls and chloroplasts.
• Plant cells have chloroplasts and ribosomes.
• Plant cells have chloroplasts and mitochondria.

Which organism is made up of cells that have both a cell membrane and a cell wall?

• desert mouse
• human 
• maple tree
• zebra

____ is credited with being the first scientist to observe cork cells.

• Leewenhoek

• Shleidon

• Hooke

An organism made of only one cell is called _____ .

• Eukaryotic

• Mutlicellular

• Monocellular

• Unicellular

Which statement is a part of the cell theory?

• all cells come from preexisting cells
• bacteria are prokaryotic cells
• eukaryotic cells are complex
• humans are multicellular