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Bio Chapter 28
Terms in this set (19)
What are the three main groups of protista?
How are protists different from the organisms in the domains Archea and Bacteria?
they are eukaryotes
How are protists classified by their habitat?
Particularly common and diverse in oceans, lakes, wetlands and rivers
-Plankton: swimming or floating
-Periphyton: attached by mucilage to underwater surfaces
How are protists classified by their motility?
-Swim using eukaryotic flagella (Flagellates)
-Some flagellated reproductive cells (Cilia)
-Gliding on protein or carbohydrate slime
What makes something a plankton?
an inability to swim against the current
Distinguish between phytoplankton and zooplankton.
-Protozoan plankton (zooplankton): heterotrophic
Classify red algae i.e. give their domain, kingdom, and phylum.
Classify green algae.
What are plastids?
double-membrane organelle found in the cells of plants and algae
Distinguish between phagotrophy, osmotrophy, photoautotrophy, and mixotrophy.
-Phagotrophy - heterotrophs that ingest particles
-Osmotrophy - heterotrophs that rely on uptake of small organic molecules
-Photoautotrophy - photosynthetic
-Mixotrophy - able to use autotrophy and phagotrophy or osmotrophy depending on conditions
__________ - term for heterotrophs that ingest particles
__________ - term for heterotrophs that rely on uptake of small organic molecules
__________ - term for protists that are able to use autotrophy and phagotrophy or osmotrophy depending on conditions
In what varying forms do algae store food?
in molecules such as Starch, polysacchrides, and oil
What are the four mechanisms by which algae defend themselves?
-Slimy mucilage or cell walls defend against herbivores and pathogens
-Calcium carbonate, silica, iron, manganese armor
-Trichocysts are spear-shaped projectiles to discourage herbivores
-Bioluminescence - startle herbivores
-Toxins - inhibit animal physiology
______________ are spear-shaped projectiles on algae that may discourage herbivores
What type of reproduction do all protists use?
How are zygotic, sporic, and gametic life cycles different from each other?
Zygotic life cycles
Most unicellular sexually reproducing protists
Haploid cells develop into gametes
+ and - mating strains
Thick-walled diploid zygotes
Sporic life cycle
Many multicellular green and brown seaweeds
Also known as alternation of generations
2 types of multicellular organisms
Haploid gametophyte produces gametes
Diploid sporophyte produces spores by meiosis
Red seaweed variation involves 3 distinct multicellular generations
Gametic life cycle
All cells except the gametes are diploid
Gametes produced by meiosis
Diatoms - one of few protists with this life cycle
Asexual reproduction reduces the size of the daughter cells
Sexual reproduction restores maximal size
What type of relationship do Plasmodium and the Anopheles mosquitoes have?
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