Biology Ch. 16 – Flashcards

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Alveolates are characterized by
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membrane-enclosed sacs under the plasma membrane.
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You culture the dried soup from a 4,000-year-old cooking pot found in an Egyptian tomb and obtain a distinctive species of prokaryote. You immerse a test tube of these bacteria in boiling water for several hours, but the colony grows back. This species is probably
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endospore-forming.
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Individual prokaryotes cells are about _____ eukaryote cells; collectively. all prokaryotes cells on Earth _____.
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one-tenth as big as...weigh about ten times as much as the total mass of eukaryote cells.
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Pairs of rod-shaped bacteria are called
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diplobacilli.
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________ are heterotrophic protists; _____ are photoautotrophic protists.
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Protozoans...algae
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Which of the following cellular structures is characteristic of amoebas?
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pseodopedia
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Chemoautotrophic bacteria obtain their carbon from ______ and their energy from _____.
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CO2...reactions involving inorganic chemicals
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Unlike archaean and eukaryotes cell walls, bacterial cell walls contain a unique substance called
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peptioglycan.
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A bacterium living in an underground septic tank thrives by absorbing organic compounds from decomposing castes. What is it?
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a chemoheterotroph
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Evidence for the relatively close relationship of archaea to eukaryotes includes
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the fact that their growth is not inhibited by certain antibiotics that inhibit bacterial growth.
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Prokaryotes genomes often include a central ring of DNA plus small accessory rings of DNA that carry genes involved in "contingency" functions. There secondary rings of DNA are called
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plasmids.
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According to this figure, which type of protist resulted from a single endosymbiosis event in its ancestry?
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Red Algae
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Intestinal gas is evidence of active ______ in one's digestive tract.
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methanogens
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Prokaryotes are classified into
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domain Bacteria and domain Archaea.
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The largest group of prokaryotes is the ______, which obtain both energy and carbon from ______.
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chemoheterotrophs... organic molecules
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The term for a close association between organisms of two or more species is
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symbiosis.
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Euglenazoans, dinoflagellates, apicomplexans, and stramenopiles all are protists groups in which some-but not all-species are photoautotrophic. According to current thinking, the organelles that enable photosynthesis in these groups are
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remnants of green or red algae that their ancestors tried to eat.
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Protists include
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multiple clades of eukaryotes: some that are closely related to plants, and others that are closely related to animals and fungi.
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Which of the following options correctly pairs a structure with its function in prokaryote cells?
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pili=help prokaryotes stick to each other and to curfaces
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Which of the following is a member of the domain Archaea?
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methanogens
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Dichotomous Key
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D, E, C, B, A
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