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archaea |
eukaryotes |
protozoa |
bacteria |
eukaryotes and prokaryotes |
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- The prokaryotes known as methanogens require ________ environments. anaerobic aerobic acidic high temperature high saltI am stuck on my homework α-proteobacteria species are important because ______? Choose all the correct statements below to fill in the blank above. Group of answer choices they can serve as mutualistic symbionts they can serve as parasitic symbionts they once served as a mutualistic symbiont to produce the mitochondria their lineage gave rise to the lineage of all eukaryotesWhich group of Archaea live in anaerobic (no oxygen) conditions such as garbage dumps? Group of answer choices Halophiles Thermophiles Methanogens
- At the Sacramento River part 3: This is a 3rd microbe you isolated; here it is stained and seen with a light microscope. What is the genus name, structures used for motility and the structure involved in sexual reproduction? OParamecium : flagella; macronucleus OEuglena ; flagella; macronucleus OEuglena_: cilia: macronucleus Paramecium_; cilia: micronucleusProkaryotes reproduce by___________ and maysometimes exchange genetic material through the processof____________ .Bacteria are _in comparison to eukaryotic cells.
- Which of the following is only found in archaea? glycerol diethers a nucleus a cell wall N-acetylmuramic acidThe genus Ferroplasma consists of a few species of acid-loving archaea. One species, F. acidarmanus, was discovered to be the main component of slime streamers (a type of biofilm) deep inside an abandoned California copper mine (Figure 4.11A). F. acidarmanus cells use an ancient energy-harvesting pathway that combines oxygen with ironsulfur compounds in minerals such as pyrite. This reaction dissolves the minerals, so groundwater that seeps into the mine ends up with extremely high concentrations of metal ions such as copper, zinc, cadmium, and arsenic. The reaction also produces sulfuric acid, which lowers the pH of the water around the cells to zero. Despite living in an environment with a composition similar to hot battery acid, F. acidarmanus cells maintain their internal pH at a cozy 5.0. Thus, researchers investigating Ferroplasma metabolic enzymes were surprised to discover that most of the cells enzymes function best at very low pH (Figure 4.11B). A. Deep inside one of the most toxic sites in the United States: Iron Mountain Mine, in California. The water in this stream, which is about 1 meter (3 feet) wide in this photo, is hot (around 40C, or 104F), heavily laden with arsenic and other toxic metals, and has a pH of zero. Slime streamers growing in it are a biofilm dominated by a species of archaea, Ferroplasma acidarmanus. B. pH profiles of four enzymes isolated from F. acidarmus. Researchers had expected these enzymes to function best at the cells cytoplasmic pH (5.0). What does the dashed line signify?Prokaryotes that obtain their energy from chemical compounds are called _____. a. photorophs b. auxotrophs c. chemorophs d. lithotrophs
- A water sample from hot spring was tested, it contained a unicellular organism having a cell wall and lacking a nucleus. This organism is most likely classified as: Paramecium O Archaea Mycoplasma O Ascomycetes Brown AlgaeWhich of the following prokaryotes has a relatively large surface-to-volume ratio for rapid gas exchange, despite having one of the largest cytoplasmic volumes of any known eubacterial cell? the archaeobacterium Halobacterium halobium the archaeobacterium Nanoarchaeum equitans the eubacterium Rhodopseudomonas viridis the eubacterium Epulopiscium fishelsoni the eubacterium Escherichia coliHalophiles are a type of archaebacteria that live in which type of environment? Oxygen-rich Extreme temperatures High Salt Methane-rich