9.1 Quick Check

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What is cell theory?

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Cell theory is a fundamental concept in biology that states: 1) All living things are made of cells, 2) Cells are the basic unit of life, and 3) All cells come from pre-existing cells.

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Where do all cells come from according to cell theory?

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All cells come from pre-existing cells.

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What is one function of cells related to energy?

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One function of cells related to energy is nutrition.

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Who improved microscope technology and observed living cells?

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Anton van Leeuwenhoek improved microscope technology and was the first to observe living cells.

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What did Matthias Schleiden discover about plants?

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Matthias Schleiden discovered that plants are made of cells.

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What did Theodor Schwann contribute to cell theory?

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Theodor Schwann found that all animals are made of cells.

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What is the basic unit of life?

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The basic unit of life is the cell.

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What are the two main types of cells?

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The two main types of cells are prokaryotic cells and eukaryotic cells.

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What is a prokaryotic cell?

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A prokaryotic cell is a simple, single-celled 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 has a nucleus and membrane-bound organelles.