Amoeba and Paramecium Biology 11

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

Amoeba Proteus

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

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.

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

Paramecium caudatum

Paramecium Grammers 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

Paramecium continued… Adaptations: –Cilia to help feed and escape –Contractile vacuoles –Trichocysts

Paramecium continued… Movement: by cilia in circular motion, move ~ 60 mm/hr 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.

Paramecium continued… Excretion: -Contractile vacuole removes excess H20. -C02 across pellicle by diffusion -anal pore removes waste. Reproduction: Asexual - cell division Sexual – conjugation (exchange of micronucleus DNA)

Paramecium continued… Size and Shape: Defined (due to pellicle)

THE END!!! Now - Compare and Contrast