Cell Theory

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. 

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When cells are damaged, new cells are created by cell a process called cell division. How does the cell theory support this fact?

• It states that all cells have a nucleus which divides.

• It states that all living things are made up of one or more cells.

• It states that cells come from previously existing cells.

• It states that the basic units of structure and function are cells.

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Who was the "scientist" who observed pond water and teeth scrapings in his microscope?

• Hooke
• Leeuwenhoek
• Schleidian
• Virchow

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What did Hooke first examine? 

• Pond water
• Plant cells
• Cork
• Animal fat

Who noted that animals are made of cells and concluded that all living things are made of cells and cell products? 

• Rudolf Virchow
• Anton van Leeuwenhoek
• Theodor Schwann
• Robert Hooke

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Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?

•  All living things are made of cells.
• All cells come from other preexisting cells.
• Cells form through spontaneous generation.
•  Cells are the basic structural and functional units of life.
  

The combined observations of Mattias Schleiden, Theodor Schwann and Rudolph Virchow resulted in the formation of the cell theory. Which of the following is not part of the cell theory?

• All cells contain a nucleus. 
• All cells come from other living cells.
• All living organisms are made of one or more cells
•  Cells are the basic unit of structure and function of all living things.

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A plant and an animal are both living things. According to the Cell Theory, what can you conclude about these two very different organisms?

• Plants have cells but animals do not.
• They are both made of one or more cells. 
• They both come from the same kind of cell.
• They both come from a non-living organism.

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Rudolph Virchow's observations helped to disprove was commonly held belief of the time?

• evolution
• the existence of molecules
• spontaneous generation
• atomic models

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Which invention from the 17th century allowed for the development of modern cell theory?

• x-rays
• computers
• the light microscope
• the scanning electron microscope