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Types of Organisms

Types of Organisms. Unicellular Organisms vs. Multicellular Organisms. Background information. What does “micro” mean? What is a microscope? What is an organism? What does “multi” mean? What is a cell?. Micro. Something very small.

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Types of Organisms

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  1. Types of Organisms Unicellular Organisms vs. Multicellular Organisms

  2. Background information • What does “micro” mean? • What is a microscope? • What is an organism? • What does “multi” mean? • What is a cell?

  3. Micro • Something very small. • When referring to an organism, it can NOT be seen without a microscope.

  4. Microscope • What is a microscope? • is an instrument used to see objects that are too small for the naked eye. • What is an instrument? • In science, it refers to laboratory equipment or tools in a laboratory used by Scientists. This includes instruments such as a microscope.

  5. What is an Organism? Definition: Organism – anything that can live on its own

  6. Cells • What is a cell? • Cells are the basic building blocks of all living things. • For example, the human body is composed of trillions of cells. • They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.

  7. Unicellular Organisms

  8. Unicellular Organisms Definition: Unicellular organism – an organism made of only one cell • Uni – means “one”. Information: These organism are very small and need to be seen with a microscope. These organisms CANNOT be seen with the naked eye.

  9. Unicellular:Common Names • Microscopic Organisms • Microorganisms • Really small living things

  10. Examples of Unicellular Organisms • Amoeba • Bacteria • Protozoa • Unicellular algae • Unicellular fungi • Unicellular yeasts • Paramecium (picture)

  11. Images of Unicellular Organisms

  12. More Images of Unicellular Organisms

  13. Multicellular Organisms

  14. Multicellular Organisms Definition: Multicellular organism – an organism made of two or more cells Information: • These organisms are able to be seen with the naked eye. • These organisms need all parts of itself to survive.

  15. Common Names • Many – celled organisms • Eukaryotic organisms • Mammals • Birds • Reptile • Fish • Many others… • If you can SEE an organism, it is multicellular

  16. Examples of Multicellular Organisms • Humans • Cats • Dogs • Insects • Birds • Flowers • Mold • Trees

  17. Images of Multicellular Organisms

  18. More Images of Multicellular Organisms

  19. Compare/Contrast • Unicellular Organisms – (one celled) organisms are good models for membrane transport, because they need to perform MANY functions with one cell, rather than many types of cells. • Multicellular organisms- organisms that consist of more than one cell, in contrast to single-celled organisms. To form a multicellular organism, these cells need to identify and attach to the other cells.

  20. Review • What type of organism is a hamster? • Multicellular • Unicellular • What is a unicellular organism? a. An organism with many cells. b. An organism that requires a microscope to view it.

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