The Cell Theory & Types of Cells

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What is the Cell Theory?

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The Cell Theory states that: 1) All living things are composed of cells, 2) Cells are the basic unit of structure and function in living things, 3) All cells arise from pre-existing cells.

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What are the main types of cells?

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The main types of cells are prokaryotic cells (e.g., bacteria) and eukaryotic cells (e.g., plant and animal cells).

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What is a prokaryotic cell?

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A prokaryotic cell is a simple, unicellular organism that lacks a nucleus and membrane-bound organelles.

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What is a eukaryotic cell?

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A eukaryotic cell is a complex cell that contains a nucleus and membrane-bound organelles, and can be unicellular or multicellular.

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What structures are unique to plant cells?

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Plant cells have cell walls, chloroplasts, and large central vacuoles, which are not found in animal cells.

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What is the function of chloroplasts?

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Chloroplasts are organelles in plant cells that conduct photosynthesis, converting light energy into chemical energy.

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What is the function of the cell wall?

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The cell wall provides structural support and protection to plant cells, maintaining their shape.

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What is the function of the cell membrane?

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The cell membrane controls the movement of substances in and out of the cell, providing a barrier and maintaining homeostasis.

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What is the significance of the statement 'All cells arise from pre-existing cells'?

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This statement emphasizes that new cells are produced through the division of existing cells, supporting the continuity of life.

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What is an example of a unicellular organism?

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An example of a unicellular organism is an amoeba, which is a single-celled protist.