Cell theory/Microscopes

These are images of human red blood cells taken by a(n)

• Compound light microscope

• Dissection microscope

• Transmission Electron Microscope

• Scanning Electron Microscope

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NGSS.MS-LS1-1

NGSS.MS-LS1-2

In the 1600s, advances in microscopy led to the development of cell theory. Which of the following statements is part of the cell theory?

• All cells require water and oxygen to survive

• All living things are made of one or more cells

• All cells have organelles with specialized functions

• All living things rely on several different types of cells

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NGSS.MS-LS1-1

Cell theory is a result of the contributions of several different scientists, and applies to all living things. Which of the following explains why cell theory will not ever become the law of cells?

• Cells of different organisms are so diverse that it is impossible to come up with a law that would apply to all of them

• Because cells undergo change as mutations occur within them, developing anything beyond a cell theory would be impractical

• Scientific theories are well-tested explanations, while laws are well-tested descriptions of natural phenomena; one cannot become the other.

• Scientific theories can only become laws if all possible cases can be tested; it would be impossible to test all living things to see if they have cells

This is an image of a living amoeba taken by what kind of microscope?

• Compound light microscope

• Dissecting Microscope

• Transmission Electron microscope

• Scanning Electron microscope

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NGSS.MS-LS1-1

NGSS.MS-LS1-2

This image (color added) shows the detailed structure of the tiny mitochondria organelle located inside an animal cell. Which microscope most likely took this image?

• Compound Light Microscope

• Dissecting Microscope

• Transmission Electron Microscope

• Scanning Electron Microscope

Students use a microscope to look for structures present in four different cells. The students placed an X for each structure that was viewed for each cell on the table shown. Which cells are most likely Eukaryotes?

• Cell W, Cell X, Cell Y

• Cell W, Cell Y, Cell Z

• Cell X, Cell Y, Cell Z

• All are Eukaryotes

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NGSS.MS-LS1-1

NGSS.MS-LS1-2

Materials are provided to students to build models of a prokaryotic cell and a eukaryotic cell. The materials and the structures they represent are listed in the table shown. Which material will NOT be used in both models?

• Orange paper circle

• Yellow paper oval

• Purple buttons

• Blue yarn

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NGSS.MS-LS1-1

NGSS.MS-LS1-2