Transcript Amoeba and Paramecium

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!!!
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