Transcript Protista
Protista •unicellular •live in water •3 types: • Protozoa • Algae • Slime moulds. Protozoa •Protists Algae Slime mould 1. Protozoans – Animal-like Protists • 2 kinds: i) Amoeba • feed on small organisms like bacteria, engulf them. are able to move ii) Paramecium found in pond water move around by using cilia (hairlike covering). 2. Algae (Plant-Like Protists) chlorophyll-containing • range in size from single cells to giant seaweeds 60 metres in length. • could be classified as plants, except lack leaves, stems, roots. • Algae • i) Brown Algae multicellular many species can be quite large ex Kelp ii) Diatoms small unicellular over 10, 000 species. iii) Red Algae multicellular found in warmer seawater is toxic, kills many fish 3. Slime Moulds and Water Moulds • are similar to fungi (produce spores), plants (have cellulose cell walls) and animals (glide around to ingest food) in some ways. • they generally live off of decaying matter. Slime Moulds Protist Parasites parasite: something that lives inside and harms its host host: what the parasite infects vector: an organism that carries a parasite and infects other things with it Malaria plasmodium mosquitos are vector lives in bloodstream and can kill host if not treated 1.5 – 2 million deaths/yr (more than AIDS) prevented with bednets treated with anti-malarial drugs monsters-inside-memalaria-parasite.html Trypanosoma cause African Sleeping Sickness vector is Tse Tse fly can infect the nervous system, killing the host monsters-inside-me-african-sleepingsickness.html Giardia parasite in untreated drinking water lives in digestive system causes severe vomiting and diarrhea Cryptosporidium parasite in infected water causes diarrhea forms a hard spore that’s difficult to kill monsters-insideme-thecryptosporidiumparasite.html