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Living Systems

Living Systems. Bacteria and Protists Dr. Marjorie Anne Wallace, Elementary Science Resource Teacher. All living things are made up of cells. Bacteria cells Plant cells Animal cells Fungi cells and Protozoan cells. Bacteria Cells. Single-celled organisms

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Living Systems

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  1. LivingSystems Bacteria and Protists Dr. Marjorie Anne Wallace, Elementary Science Resource Teacher

  2. All living things are made up of cells. • Bacteria cells • Plant cells • Animal cells • Fungi cells and • Protozoan cells

  3. Bacteria Cells • Single-celled organisms • No true nucleus Bacteria cells have: • Cytoplasm, • a cell wall, and • a cell membrane. • Some bacteria are harmful while others are helpful.

  4. Bacteria cells • Bacteria are the smallest and simplest organisms in the world • Bacteria can be found everywhere life is. Kingdom Bacteria

  5. Bacteria cells cheese • Bacteria can be helpful • 1. Feed on dead matter- =decomposers; • 2.Make certain foods- cheese, pickles, yogurt, butter, chocolates; 3. In our intestines bacteria make vitamins and help digest foods. yogurt Pickled eggs

  6. A drawing of a bacteria cell. Bacteria cell cytoplasm cell wall & cell membrane *nuclear material

  7. Question #1: • 1 It is easy to identify a bacteria cell under the microscope because it doesn’t have- A cell membrane B cell wall C cytoplasm D nuclear membrane

  8. Answer to question #1. • You got it! D • Bacteria do not have a true nucleus so they don’t have a nuclear membrane.

  9. Protozoan cells • These organisms are single celled • Some are consumers, • Some are producers, • Some eat food AND need sun light for photosynthesis. • Can you name a few protozoa?

  10. Kingdom Protista Amoeba • Single celled organisms. • Cell membrane is on the outside to protect the cell and help matter move in and out of the cell. • Cytoplasm is the clear jelly like matter that protects the inside cell parts. nucleus Cell membrane cytoplasm

  11. Kingdom Protists Large Nucleus & nucleolus • Some Protozoan cells have several nuclei. • The Nucleus is the control center of the cell. This organelle tells the cell what to do. These microorganisms live in moist environments. micronucleus Paramecium

  12. The World of Protists • Protists live in lakes, rivers, oceans, and damp soil. • Most protists are single-celled and contain a nucleus and other cell structures needed to carry out their basic life functions. • Some protists are multicellular and have more than one cell. • Animal-like protists are called protozoans. • Amoebas, paramecium, and Euglena.

  13. The World of Protists Euglena • Plant-like protists can produce their own food by using the Sun’s energy. • Plant-like protists have chlorophyll, a green pigment. • Euglena are animal-like & plant-like. eyespot nucleus chloroplast

  14. Question #2 • Inside of a cell, many materials and organelles are suspended and protected by this gelatin like substance- F cell wall G cell membrane H cytoplasm J chloroplasts

  15. Answer #2 • You did it again! H • Yes, cytoplasm is the gelatin like or clear jello like substance that protects and suspends all the internal cell organelles.

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