Kingdom Protista

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Kingdom Protista . May be unicellular or multicellular . May be autotrophic or heterotrophic . May reproduce sexually or asexually. Protists are very varied . Can be further divided . Usually found around liquid water . eukaryotic Protozoa – Animal-like Protists . Mostly single-celled, motile organisms that feed by phagocytosis. Usually too small to be seen without a microscope. Classified based on locomotion. 1. Phylum Zoomastigina – animal-like protists that move by means of flagella. 2. Phylum Ciliophora – animal-like protists such as Paramecium, which move using cilia. 3. Phylum Sarcodina – move by means of cytoplasmic streaming. 4. Phylum Sporozoa – Parasites that form spores at some point in their life cycle. http://www.youtube.com/watch?v=fmwN_mD7TvY&saf ety_mode=true&persist_safety_mode=1&safe=active http://www.youtube.com/watch?v=7pR7T NzJ_pA&safety_mode=true&persist_saf ety_mode=1&safe=active Algae – Plant-like Protists . Photosynthetic . Range from unicellular to multicellular seaweed 60m in length. Have been on Earth for 2 billion years . Classified based on colour. 1. Phylum Chlorophyta – Green algae, the most plant-like of all algae. 2. Phylum Phaeophyta – Brown algae. Seaweeds such as kelp (Laminaria). Found in colder waters. 3. Phylum Rhodophyta – Red algae. Found mostly in warmer waters. 4. Phylum Chrysophyta – unicellular and photosynthetic. Make up most plankton. 5. Phylum Pyrrophyta – Dinoflagellates, which are extremely numerous. Each one contains 2 flagella and a protective coat of cellulose. 6. Phylum Euglenophyta – unicellular freshwater organisms with 2 flagella – usually heterotrophic. Fungus-like Protists – Slime Moulds and Water Moulds . Reproduce by spores. Have cellulose cell walls . Very difficult to classify . 1. Phylum Oomycota – water moulds, similar to fungi. Are saprophytes, meaning they feed on dead organic matter. Caused the Irish Potato Famine. 2. Phylum Myxomycota – Plasmodial Slime Moulds. Engulf small particles of food. 3. Phylum Acrasiomycota – Cellular slime moulds. Usually exist as single cells, but can group together if necessary. http://www.youtube.c om/watch?v=gsOA- 5H_L2g .

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