What scientific tool led to the discovery of cells?

• Telescope

• Microscope

• Thermometer

• Bunsen burner

Who was the first scientist to observe and name “cells” while looking at cork?

• Theodor Schwann

• Anton van Leeuwenhoek

• Robert Hooke

• Matthias Schleiden

What did Anton van Leeuwenhoek discover while observing pond water?

• Tiny living organisms

• Plant structures

• Animal cells

• Dead cells

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What is NOT one of the three main points of the cell theory?

• All living things are made of cells

• Cells are the basic unit of life

• Cells can be created from nonliving materials

• New cells come from existing cells

Which scientist concluded that all plants are made of cells?

• Rudolf Virchow

• Matthias Schleiden

• Theodor Schwann

• Anton van Leeuwenhoek

What is the main difference between a light microscope and an electron microscope?

• Light microscopes use lenses, while electron microscopes use sound waves

• Light microscopes use electrons, while electron microscopes use light

• Light microscopes use light to magnify objects, while electron microscopes use beams of electrons

• Light microscopes can see smaller details than electron microscopes

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Why must electron microscope samples be placed in a vacuum?

• To remove extra light from the sample

• To prevent air particles from interfering with the electron beams

• To preserve living organisms

• To make the images appear in color

Which type of microscope produces a 3D image of a specimen’s surface?

• Transmission electron microscope

• Scanning electron microscope

• Compound light microscope

• Magnifying glass

What was Rudolf Virchow’s contribution to the cell theory?

• He discovered animal cells

• He stated that all plants are made of cells

• He proposed that new cells come from existing cells

• He invented the microscope

How did the discovery of cells change our understanding of life?

• It proved that all living things are made of tiny, basic units of life

• It showed that only plants and animals have cells

• It confirmed that cells only exist in nonliving things

• It led to the discovery of atoms