安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
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- Cell | Definition, Types, Functions, Diagram, Division, Theory, Facts . . .
Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things Most cells have one or more nuclei and other organelles that carry out a variety of tasks Some single cells are complete organisms, such as a bacterium or yeast
- What Is a Cell? | Learn Science at Scitable - Nature
Some cells are organisms unto themselves; others are part of multicellular organisms All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates
- Cell - National Human Genome Research Institute
All cells can be sorted into one of two groups: eukaryotes and prokaryotes A eukaryote has a nucleus and membrane-bound organelles, while a prokaryote does not Plants and animals are made of numerous eukaryotic cells, while many microbes, such as bacteria, consist of single cells
- Cells - University of Utah
Learn how cells work together in tissues, organs, and organ systems In 1665, Robert Hooke coined the term cell to describe the structures he could see in cork with some of the first microscopes Since then, technology has given us an increasingly complex view of the basic unit of life
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