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Living Systems Bacteria and Protists Dr. Marjorie Anne Wallace, Elementary Science Resource Teacher.

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Presentation on theme: "Living Systems Bacteria and Protists Dr. Marjorie Anne Wallace, Elementary Science Resource Teacher."— Presentation transcript:

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2 Living Systems Bacteria and Protists Dr. Marjorie Anne Wallace, Elementary Science Resource Teacher

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

4 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.

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

6 Bacteria cells 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. cheese yogurt Pickled eggs

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

8 Question #1: 1 It is easy to identify a bacteria cell under the microscope because it doesnt have- A cell membrane B cell wall C cytoplasm D nuclear membrane

9 Answer to question #1. You got it! D Bacteria do not have a true nucleus so they dont have a nuclear membrane.

10 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?

11 Kingdom Protista 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. Amoeba cytoplasm Cell membrane nucleus

12 Kingdom Protists 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. Large Nucleus & nucleolus micronucleus Paramecium

13 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.

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

15 Question #2 Inside of a cell, many materials and organelles are suspended and protected by this gelatin like substance- F cell wall Gcell membrane Hcytoplasm Jchloroplasts

16 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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