1. Amoeba and Paramecium

2. Amoeba Growth – 0.6mm biggest (most smaller) Responsive
– positive to food
- negative to harsh chemicals, light and cold.
-Can distinguish food from non-food.

3. Amoeba

4. Amoeba continued… Adaptations: -pseudopods for moving and feeding.
-contractile vacuole
-plasmasol / plasmagel
Movement:
-by pseudopods or “false feet”
-move on solid surfaces – cannot swim
-move ~ 20mm/hr

5. Amoeba continued… Metabolism: -eat by phagocytosis
-drink by pinocytosis
-food vacuoles develop
-digestion by lysosomes
-feed on paramecium and flagellates
-O2 & CO2 free to diffuse across P.M.

6. Amoeba continued…
Excretion: Exocytosis removes indigestible materials. CO2 diffuses across PM
Reproduction: Asexual – cell division.
Size and Shape: Undefined.

7. The End Now – Please Finish Worksheets

8. Paramecium

9. Paramecium Growth: 0.05 mm avg. Respond:
-react to chemicals – salt and vinegar
-live in slightly acidic environments (stagnant H2O)
-anterior end sensitive – move by trial and error

10. Paramecium continued…
Adaptations:
Cilia to help feed and escape
Contractile vacuoles
Movement: by cilia in circular motion, move ~ 60 mm/hr

11. Paramecium continued…
Metabolism:
-food pulled into oral groove by cilia
-food vacuole forms at gullet
-Lysosome aids with digestion
*Feed mostly on bacteria, smaller protozoans and algae.

12. Paramecium continued…
Excretion:
-Contractile vacuole removes excess H20.
-anal pore removes waste.
Reproduction: Asexual - cell division
Sexual – conjugation (exchange of micronucleus DNA)

13. The End Now – Please Finish Worksheets