Download Protists

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