T7E1 Cell Theory

What is the main idea of the cell theory?

• All living organisms are composed of cells.

• Cells are the basic unit of life.

• All cells come from pre-existing cells.

• All of the above.

Who was the first to observe and describe box-shaped structures from cork, later identified as cells?

• Matthias Schleiden

• Theodor Schwann

• Robert Hooke

• Rudolf Virchow

In 1838, Matthias Schleiden observed that all ______ are made up of cells.

• plants

• animals

• bacteria

• fungi

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Which scientist was the first to publish that all new cells come from pre-existing cells?

• Rudolf Virchow

• Louis Pasteur

• Robert Hooke

• Theodor Schwann

What tool allowed scientists to see enlarged images of tiny objects, leading to the development of cell theory?

• Microscope

• Telescope

• Stethoscope

• Thermometer

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NGSS.MS-LS1-1

What is the fundamental structural unit of living matter according to cell theory?

• Cell

• Atom

• Molecule

• Tissue

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List the three components of cell theory.

• All living organisms are composed of one or more cells, The cell is the basic unit of life, All cells arise from pre-existing cells

• Cells are the smallest unit of matter, Cells can only be seen under a microscope, Cells are the building blocks of tissues

• Cells contain a nucleus, Cells have a cell membrane, Cells are filled with cytoplasm

• Cells can reproduce independently, Cells can perform photosynthesis, Cells can move freely

The word 'component' refers to a part of a larger whole. Which of the following best describes the components that make up your body?

• Cells

• Organs

• Tissues

• All of the above

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Which of the following is a component of cell theory?

• Cells are the basic unit of structure and function in all living things.

• All new cells are made from preexisting cells.

• All living things are made of one or more cells.

• All of the above.

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NGSS.MS-LS1-1

What technological advancement in the 1930s allowed scientists to make more detailed observations about cells?

• Electron microscope

• X-ray diffraction

• Ultracentrifuge

• Polymerase chain reaction