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Protista Amoeba Chlamydomonas Euglena Paramecium.

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Presentation on theme: "Protista Amoeba Chlamydomonas Euglena Paramecium."— Presentation transcript:

1 Protista Amoeba Chlamydomonas Euglena Paramecium

2 Classification Based on method of locomotion Rhizopoda Rhizopoda – have pseudopodia eg amoeba Flagellates Flagellates include Chlamydomonas & Euglena Ciliates Ciliates include Paramecium

3 Amoeba No definite shape Phagocytosis  food vacuole stores and digests Moves by anterior and secondary pseudopods. Would you expect to find an eye spot in amoeba? No – amoeba doesn’t need light – no photosynthesis!

4 contractile vacuole food vacuole pseudopod (very short)

5 Chlamydomonas Unicellular flagellate green alga. Chloroplasts for photosynthesis. Pyrenoids are centres of carbon dioxide fixation within the chloroplasts of algae Would chlamydomonas have an eye spot? Yes – chlamydomonas photosynthesises! Eye spot is part of the large chloroplast

6 contractile vacuole chloroplast flagellum

7 Euglena Heterotrophic phagocytosis AND Autotrophic photosynthesis (has chloroplasts) Fresh water / salt water / soil. Whip-like flagellum. Can form dormant spore in dry conditions. Would euglena have an eye spot? Yes – usually red, near flagellum.

8 eye spot contractile vacuole chloroplast (very short)

9 Paramecium Freshwater ciliate Deep oral groove with oral cilia which draw food inside. The bubbles throughout the cell are also vacuoles. Cilia all over the body or restricted only to certain regions. Would paramecium have an eye spot?No

10 zcsdY&NR=1&feature=fvwphttp://www.youtube.com/watch?v=l9ymaS zcsdY&NR=1&feature=fvwp (eating) contractile vacuoles meganucleus (short)

11 OrganismNutritionMovementOsmoregulationEye spot Amoebaheterotrophic Paramecium cilia Euglena contractile vacuole Chlamydomonas y Complete table in Chilton booklet OrganismNutritionMovementOsmoregulationEye spot Amoebaheterotrophicpseudopodia Contractile vacuoles n Parameciumheterotrophic cilia Contractile vacuoles n Euglenaheterotrophic and autotrophic flagellum contractile vacuole y Chlamydomonas heterotrophic and autotrophic flagella Contractile vacuoles y

12 Handouts Unicellular Protists handout Clickview  Homeostasis (25 min)

13 MENU Key Words Exercises Quick Quiz Videos Recap Label fun

14 Key words Metabolism Substrate Product Reaction rate Enzyme Globular protein Biological catalyst 3D structure Denaturation Active site Specificity Enzyme-substrate complex Lock and Key model Induced fit model Exergonic Endergonic Activation energy Back to menu

15 Quick quiz 1.Chemical reactions in living cells are _____ reactions 2.____ reactions build up molecules 3.____ reactions break down molecules 4.____ speed up reactions 5.____ are biological catalysts 6.Enzymes are made of ____ 7.Enzymes are ____-shaped 8.Enzyme function depends on its ____ 9.The ____ site of the enzyme binds with the substrate 10.____ model: substrate must fit exactly into the enzyme 11.____ model: enzyme shape can change to fit 12.Enzymes lower the ____ required to initiate a reaction Back to menu Answers

16 Quick quiz 1.Chemical reactions in living cells are metabolic reactions 2.Anabolic reactions build up molecules 3.Catabolic reactions break down molecules 4.Catalysts speed up reactions 5.Enzymes are biological catalysts 6.Enzymes are made of protein 7.Enzymes are globular-shaped 8.Enzyme function depends on its shape 9.The active site of the enzyme binds with the substrate 10.Lock and key model: substrate must fit exactly into the enzyme 11.Induced fit model: enzyme shape can change to fit 12.Enzymes lower the activation energy required to initiate a reaction Back to menu

17 Exercise Workbook p58 Pathfinder pp42-3 qq 1-4 Chilton Booklet Back to menu

18 Videos om_Protista&video_id= (7minutes) om_Protista&video_id= Back to menu

19 Recap Back to menu Draw and label each protist Pathfinder p43, q1-3 Pair up with a friend and teach each other Draw a mind- map of important processes Chilton booklet worksheet

20 Amoeba Osmoregulation – contractile vacuoles expel ___________ Nutrition – pseudopods engulf _____ Contains ingested ___________ Locomotion – flowing of __________ food psudopod water food Back to menu

21 2 hairlike projections for rapid, jerky movement composed of cellulose cell wall flagella for light detection eye spot osmoregulation contractile vacuole storage starch granule starch formation pyrenoid Back to menu

22 beats for locomotion eye spot for light detection flexible, inside plasma membrane – cell can change shape osmoregulation Back to menu

23 2 beat for locomotion oral groove with cilia to beat food into mouth Back to menu

24 Mitosis and Cytokinesis No sexual reproduction Back to menu


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