Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Protists Characteristics Most diverse kingdom Eukaryotic o Organelles, membrane around DNA Some pathogenic (Malaria, sleeping sickness) Phylum Protozoa Characteristics Single celled animals Heterotrophs Can live in freshwater or marine environments Grouped by the way they move (motility) Motility Pseudopodia (false foot) o No cell wall o Extend plasma membrane in one direction, rest of the body streams behind it o Place pseudopodia around food endocytosis Ex. Amoeba Flagellates o Move with one or more flagellum o Whip-like structure Ex. Zooflagellates Ciliates o 8000 members of Phylum Protozoan o Move with cilia, hundreds of small hairs that cover entire body Algae Characteristics Single celled & a few multicelled Live in freshwater and marine environments Autotrophs, photosynthesis Contain four kinds of chlorophyll & other photosynthetic pigments o Different colors: purple, red, olive-brown, yellow, goldenbrown 6 Sub-phyla Euglenoids o single celled o have both plant and animal characteristics lack cell wall, contain chlorophyll, will ingest food if light not available Ex. Euglena Diatoms o single celled o photosynthetic – chlorophyll & cartenoids (golden-yellow color) o have shells of silica, cover sea floor, fossilize & can make limestone Dinoflagellates o single celled o Photosynthentic – chlorophyll, cartenoids & red pigment o 2 flagella Green Algae o Multicelled o 7000 species, most diverse o Photosynthetic – chlorophyll, a few have yellow pigments o Most marine, a few fresh water and some live in moist soil of rainforests & in the fur of sloths Red Algae (Rhodophyta) o Multicellular marine seaweeds o Live at depths of 100m o Photosynthetic – chlorophyll, phycobilins (absorb green, violet, blue light, only light that can get to that depth) Brown Algae o Multicelled o 1500 species o live in salty water along rocky coasts in cool areas of ocean o many have air bladders to keep them near surface o Photosynthetic – chlorophyll, fucoxanthin (yellowish-brown) Fungus-like Protists Characteristics Have fungus like features and characteristics Multicellular Slime molds o Can be vividly colored – rich blue, violet, jet black o Live in cool, moist, shady places o Grow on damp organic matter (rotting logs) o Decomposes the organic matter o Can move around, engulf food like an amoeba o Make spores (like fungi) to reproduce Water Molds & Downy Mildews o Some feed on dead organisms o Most live in water or in moist places o Others plant parasites (Phytophthora infestans kills tomato plants) o Appear as fuzzy growths on decaying matter