PROTISTS EUGLENA, AMOEBA, PARAMECIUM, VOLVOX ]\

What is a protist? Protist—diverse group of single-celled organisms. Eukaryotic

Euglena Movement- flagellum Flagella – a whip-like tail that moves quickly back and forth to propel (or move) the protist through water. Producer- can do photosynthesis to make food Hunter- captures food Eyespot – an organelle in the euglena that is sensitive to light Contractile vacuole collects excess water then shoots it out of the cell. Reproduction- -asexual (binary fission)

AMOEBA Movement- The cell shapes itself into pseudopods (false feet) Pseudopod – an extension of the cytoplasm that forms when the cytoplasm extends (or stretches out) away from the nucleus. It is used by the amoeba for movement and engulfing its food. Can be parasite in humans Reproduction- asexual (binary fission)

PARAMECIUM Movement- cilia Cilia – the tiny hairs surrounding the cell Reproduction- sexual (two parents) Special feature- two nuclei (macronucleus and micronucleus) Waste- Anal Pore (food waste is removed) Contractile Vacuole (water waste removed) d for movement.

VOLVOX Composed of a colony of more than 50,000 tiny cells Movement- Many flagella help move the colony. photosynthesis and flagella help bring in nutrients. Eyespots sense light.

Protists Groups and Features Common Protists Protists Groups and Features Protist Sketch Movement Food source (Energy) Specialized Features Euglena Unicellular Flagellum Feeds on other organisms; Also makes its own food by photosynthesis Eyespot Amoeba Pseudopods Feeds on other organisms Paramecium Cilia Oral groove and contractile vacuole Volvox Lives in colonies Flagella Makes its own food by photosynthesis

Volvox

Amoeba Moves by cytoplasmic streaming Surrounds food and engulfs it using pseudopods. The food is then stored and digested in vacuoles.`

Amoeba Changes shape drastically Heterotrophic Uses Phagocytosis to surround and engulf it’s food. Contains Psedopods (False Feet) To move. Eats bacteria, algae, and other protists Reproduces asexually

Paramecium Most complex and specialized of the protists Unicellular Contain an oral groove which collects food and swept into it’s mouth. It’s mouth is calle dthe anal pore. Moves by cilia (hair-like projections)`

Paramecium Fast--Can move about 12 body lengths per second Shape of a pill capsule Heterotrophic Relatively large Common in pond scum and freshwater Has two nuclei (macro and micro)`

Euglena Found in Fresh and Salt Waters Possesses a RED EYESPOT. This organelle helps with photosynthesis. Autotrophic and Heterotrophic Green in color which shows it is made up of chloroplasts when eating autotrophically. Uses Phagocytosis (engulfing and surrounding it’s food) when eating heterotrophically.

Paramecium Uses cilia to sweep food into the oral groove Feeds on micro-organisms like bacteria, algae, and yeasts Is covered in cilia so it spirals through water`

Volvox A spherical colony of up to 50,000 cells Contains chloroplasts The colony revolves Moves and acts as one multicellular organism but one cell can survive independent of the colony

Volvox Type of green algae freshwater – ponds, ditches, puddles, lagoons Colonies use flagella to swim Cells have eyespots Reproduces asexually and sexually Autotrophic Makes food by photosynthesis