Presentation on theme: "Plant-Like & Fungus-Like Protists"— Presentation transcript:
1 Plant-Like & Fungus-Like Protists Unit 6 – Lecture 3
2 Algae – an Introduction Alga – plant like protist – plural, algaeunicellular or multicellularmajor producer of world’s oxygensexual or asexual reproduction or bothalternation of generationsautotrophic – photosynthetic
3 Algae – An introduction Six Phyla of AlgaeEuglenophytaBacilliarophytaDinoflagellataChlorophytaRhodophytaPhaeophyta
4 Discuss All of these end in “phyta” phyte, phyto or phyta refer to being ____________ like or being a ______________.
5 Euglenophyta the Euglenoids plant-like photo- synthesis, but animal-like movement w/ flagellumunicellularautotroph and heterotrophasexual reproductionpellicle & red eye-spot(eyespot)
6 Bacillarophyta Diatoms unicellular autotrophic – photosynthetic chlorophyll & carotenoidsasexual or sexual reproductionsilica shells, diverse shapesfood storage as OIL not starch
10 Discuss Which phylum of algae… have shells made of glass? are responsible for the harmful red tides?are both auto- and hetero- trophic?Which type(s) of algae are phytoplankton, and what great benefit do phytoplankton serve?
11 Chlorophyta Green Algae – most diverse unicellular, multicellular, or colonialmost in water but all need moist place to survive…
12 …a moist place like a SLOTH! [only 2 – 4 meters per minute ] Chlorophyta…a moist place like a SLOTH! [only 2 – 4 meters per minute ]
13 Chlorophytacan have flagellaalternation of generations
14 Alternation of Generations type of reproduction utilizing asexual & sexual means
15 Alternation of Generations offspring generations alternate between being haploid [1n] in one generation to being diploid [2n] the next.
16 Alternation of Generations Sporophyte [2n] produces spores [1n] through meiosis
17 Alternation of Generations Spores [1n] produce gametophytes [1n] through mitosis
18 Alternation of Generations Gametophyte [1n] produces gametes [1n] through mitosis
19 Alternation of Generations Gametes [1n] fuse in fertilization to produce zygote [2n]
20 Alternation of Generations Zygote [2n] grows to become embryo [2n]
21 Alternation of Generations Embryo [2n] grows to become sporophyte [2n]…etc.
22 Discuss – What You Need to Know About Alternation of Generations type of reproduction utilizing _______________ & _______________ meansoffspring generations alternate between being _______________ [1n] in one generation to being _______________ [2n] the next.gametophytes [1n] make _______________ [1n] through mitosissporophytes [2n] make _______________ [1n] through meiosis
24 Other Phyla Phaeophyta – brown algae, kelp most in salt water have air bladders to keep them afloat
25 What is the most diverse group of plant-like protists? DiscussWhat is the most diverse group of plant-like protists?
26 Fungus-Like Protists Slime Molds, Water Molds, & Downy Mildews unicellular to colonialheterotrophic – saphrophytichave cell wallslive in moist placesall have movement at some point in their life cycle to get to food
27 Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like examplesmyxomycota – plasmodial slime moldsform a plasmodiumno cell wallno membranes
28 Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like examplesmyxomycota – plasmodial slime moldsform a plasmodiummany nuclei – cells merge together into a large massamoeboid movementreproduce with spores
29 Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like examplesacrasiomycota – cellular slime moldscome together to reproduce only when food is scarce – otherwise, independenthas cell membranehaploid during entire life cycle
30 Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like examplesoomycota – water molds & downy mildewsproduce flagellated reproductive cellsvery large and diverse group
31 Discuss What word refers to… the color red? the color green? the color brown?plant or plant-like?fungus or fungus-like?
32 Homework complete the Euglena Reading & Coloring w/s [and finish the webquest if you haven’t done so… it’s due tomorrow]