Human cell

Discovery Science: Earth – Microorganisms – Heterotrophic Single-celled Organisms

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Earth Science: Microorganisms – Single-celled Organisms Protists (Protista) are a group of eukaryotes, mostly single-celled organisms, which are difficult to classify as animals, plants, or fungi. All protists have a nucleus and cell organelles as typically seen in other organisms. Species of this group are often classified according to their feeding mechanisms. However, this classification … Read more

Discovery Science: Earth – Evolution – Cell Organelles

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Earth Science: Biology – Evolution – Cells “Every cell comes from another cell,” physician Rudolf Virchow observed as early as 1855. Biologists refer to cells as the “building blocks of life,” since all living things, including animals, plants, and fungi, are made up of cells. A single cell can even form a complete unicellular organism. … Read more