chapter 20 – Flashcards with Answers
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What is a type of antibiotic?
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penicillin - blocks enzyme that facilitates cell wall formations
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What are the three protists groups?
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proclucers, heterotrophs that move, and heterotrophs that can't move
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What protists are producers?
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algae, seaweeds, red algae, green algae, brown algae, single-celled algae, diatoms, dinaoflagellates
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Where do algae live? what do they all have?
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in water. chlorophyll
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red algae live where? what do they have?
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deep in the tropical waters. chlorophyll, red pigment
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what does the red pigment in red algae do?
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allows the algae to absorb the light in deep waters
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what is an example of red algae?
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sebdenia
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where do green algae live? what do they have?
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water, moist soil, melting snow, tree trunks, and inside other organisms. some live in groups called colonies
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what is an example of green algae?
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volvox
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What are in euglenoids?
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chloroplasts, nucleus, contractile vacuole, eyespot, and flagella (usually two), they are single-celled
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What is an eyespot?
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it is not an eye it is something that senses light
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contractile vacuole?
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holds excess water and removes it from the cell
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where do euglenoids live?
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freshwater
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Heterotrophs that move usually are...
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single-celled consumers or parasites
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heterotrophs are also known as...
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protozoans
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amoebas where do they live? what do they have?
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fresh and salt water and parasites in animals. contractile vacuole, psuedopodia
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what do shelled-amoeba have?
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some have outershells like radiolarians
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what is an example of a shelled-amoeba with a snail-like shell?
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foraminiferans
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where do zooflagellates live?
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water and some are protists
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if the zooflagekllate is a protist they might live in...
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mutualism
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mutualism
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where one organism lives closely with another helping each other to live
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ciliates have what?
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cilia
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cilia
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hair like structures
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what is an example of ciliates?
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paramecium
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what do paramecium have?
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macronucleus, micronucleus, food vacuole, cilia, contractive vacuole, anal pore, and food passageway
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macronucleus
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the larger nucleus that controls the functions of the cell
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micronucleus
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smaller nucleus that passes genetic info to another paramecium during sexual reproduction
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what are water molds?
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decomposers or parasites
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heterotrophs that can't move are..
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spore-forming protists
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parasite
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absorbs nutrients from host
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can slime molds move?
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during a certain phase of their life cycle they can move using psuedopodia.
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what do slime molds eat?
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bacteria and yeast
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spores
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small reproductive cells covered by a thick cell wall
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what can survive long periods of time without water or nutrients?
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spores
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what kind of reproduction do protists have?
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asexual and sexual
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binary fission
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single celled protist divides into 2
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multiple fission
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make more than 2 offspring from one parent
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what uses sexual reproduction?
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paramecia
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2 paramecia exchange DNA then they...
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divide into 4 paramecia
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Can protist reproduce both ways?
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yes, some alternate between generations while some depend on environment (like slime mold)
