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The Magical world of… Protists Most are Unicellular Have to use a microscope to see them……. Compound Microscope Eyepiece 10x Lens 20x Lens x Eyepiece= Magnification 10x 20x 200x 10x 40x 400x Some Favorites Protist Basics! Eukaryotes Nucleus Mitochondria Cell Membrane Ribosome Vacuole Sometimes….. Organelles Cell Wall Chloroplast Flagella Cilia We’ve all got to breathe and eat!!! Protists can absorb their food and oxygen right through their cell membrane Pseudopodia • Means “false foot” • Part of the Protist’s body extends or reaches out to help it move or catch food. • Example: Amoeba Some Protists have chloroplasts like a plant and make their own food like the Euglena Euglena Eyespot • Euglena have eyespots which allow them to sense light • Allows organism to “see” food or predators Cilia • Small Hairs used for movement or in feeding We’ve all got to eat!!! And…expel… Oral Groove and Anal Pore Food goes in Oral Groove, digested by a vacuole, leaves through anal pore. Contractile Vacuole • An organelle that helps the cell maintain water balance. Protists often reproduce by Binary fission This is when they divide in two Gettin’ Jiggy with it!!! Nah Nah Nah Nah Phototaxis Movement towards the light Ex. Euglena move towards the light to do photosynthesis Gettin’ Jiggy with it!!! Nah Nah Nah Nah Chemotaxis Moving towards or away from a chemical Examples: Moving away from a dangerous chemical Moving towards food Now isn’t all that just CRAZY!?!?!?!