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20 Cards in this Set
- Front
- Back
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Protists-3 characteristics?
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unicelluar, colonia, or simple multi-cellular organisms
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coenocytic
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multinucleate mass of cytoplasm
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3 types of protists?
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Algae
water molds protozoa |
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symbiosis
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intimate association between organisms of different species
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3 symbiotic associations
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mutualism
commensalism parasitism |
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mutualism
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both partners benefit from each other
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commensalism
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1 partner is benefits and the other has no effect
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parasitism
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1 partner benefits (parasite) and the host is harmed.
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evolution of protists
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protists were the 1st eukaryotic cells to eveolce from prokaryotes
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endosymbiont theory
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organelles (mitochondria & chloroplasts) have evolved from mutually symbiotic relationship b/t 2 prokaryotic organisms
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mutualism
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both partners benefit from each other
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commensalism
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1 partner is benefits and the other has no effect
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parasitism
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1 partner benefits (parasite) and the host is harmed.
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evolution of protists
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protists were the 1st eukaryotic cells to eveolce from prokaryotes
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endosymbiont theory
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organelles (mitochondria & chloroplasts) have evolved from mutually symbiotic relationship b/t 2 prokaryotic organisms
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evolution of mitochondria & chloraplasts
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chloraplasts evolved from cyanobacteria.
mitochondria from aerobic bacteria |
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evolution of ER and nuclear envelope
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formed from plasma membrane invaginations
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ALGAE
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have pigments
cellwalls: cellulose energy reserve: starch evolved into: land plants |
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asexual reproduction in algae
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zoospores are formed which are haploid.
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Sexual reproduction in algae
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their gametes are identical (isogametes). A zygote is formed and releases 4 zoospores.
thruout most of life cycle algae is haploid. |
