History of Cells and the Microscope

Unlike Hooke, Leeuwenhoek observed cells that

• had no cell walls.

• came from plants.

• were alive.

• could only be seen with a compound microscope.

How does magnification occur in an electron microscope?

• An electron beam creates an enlarged image.

• An electron beam actually makes the object become larger.

• Light is changed into electrons by a convex lens.

• Light is reflected by an electron beam.

The invention of the microscope made it possible for people to discover

• plants.

• skin.

• animals.

• cells.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which of the following statements is part of the cell theory?

• Only plants are composed of cells.

• All cells are produced (made) from other cells.

• Cells can be produced from nonliving matter.

• Cells are one of several basic units of structure and function in anything.

What does the term resolution refer to?

• how well structures close together can be distinguished, or how clear and detailed the image is

• how large an image can be

• how many lenses a microscope uses

• how much light is needed to see an image

A microscope allowed Hooke to see “tiny rectangular rooms,” which he called

• organs

• cells

• bacteria

• microbes

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Cells are the basic units of _______________________________ in living things.

• protein and lipids

• carbon and oxygen

• structure and function

• food and oxygen

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

A light microscope that has two or more lenses is called a(n) ____________________ microscope.

• electron

• compound

• simple

• duplex

Scheliden discovered that all ________________ are made of cells.

• animals

• plants

• fungi

• protists

Tags

NGSS.MS-LS1-1

Schwann determined that all ________________ are made of cells.

• plants

• animals

• fungi

• protists

Tags

NGSS.MS-LS1-1