Scsc 301 exam 2 - Study guides, Class notes & Summaries

What are the 3 domains of life? correct answer: Archaea, Bacteria, Eukarya What is a soil micro biome? correct answer: A representation of all 3 domains of life ie. microbial community Which domain of life is being described: - Methanogens - Extremophiles - Oldest known organisms correct answer: ARCHAEA Which domain of life is being described: - Cyanobacteria (photosynthetic, O2) - Eubacteria (true) - Abundant and diverse correct answer: BACTERIA Which domain of lif...

SCSC 301 Exam 2 Questions And Answers With Complete Solutions

an organism that can use CO2or CO3- (i.e., inorganic C) as a C source, and obtain energy from the sun (photo) - or from the oxidation of inorganic elements or compounds such as iron, sulfur, hydrogen, ammonium, and nitrites (chemo)? correct answer: Autotroph such as plants, algae, cyanobacteria, etc. an organism that can only get carbon and energy from organic compounds? correct answer: Heterotroph such as bacteria, fungi, protozoa, etc. an organism that grows only in the presence of mol...

SCSC 301 Exam 2 with Questions and Answers Soil Atmosphere ANSWER -Varies from atmosphere -Contains 2 main gases needed for the two most important biological processes -High CO2, lower O2 than atmosphere -vital for soils to exchange gases Photosynthesis - consumes CO2 and H2O and releases O2 and produces sugars Respiration - Consumes O2 and releases CO2, H2O, and energy -Microbes and plant roots need O2 and removal of CO2 C6H12O6 + 6O2 --> <-- 6CO2 + 6H2O Oxygen Availabi...

The subsoil horizon symbol for the zone of maximum eluviation is: correct answer: E The percent organic matter in soils increases as_____ decreases correct answer: Temperature The horizon that movement and accumulation of sodium is a microprocess essential to the occurrence of is: correct answer: Bn The epipedons that are thick with a dark color, low base status, and good structure are called: correct answer: Umbric In the soil forming macroprocess, the formation of clay minerals...

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SCSC 301 Exam 2 Review with Questions and Answers autotroph ANSWER -uses inorganic carbon -obtain energy from sun -obtain energy from oxidation of inorganic elements or compounds (Fe, S, H, ammonium, nitrates) heterotroph ANSWER gets carbon and energy from organic compounds aerobe ANSWER only grows in presence of molecular oxygen anaerobe ANSWER only grows in the absence of molecular oxygen facultative anaerobe ANSWER capable of both aerobic and anaerobic metabolism examples ...

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SCSC 301 Exam with Practice Questions and Answers A soil has a bulk density of 1.3 g/cm3, a particle density of 2.6 g/cm3, a total porosity of .5, and a gravimetric water content of .2. calculate the water-filled porosity. a) .2 b) .24 c) .26 d) .5 e) 1.30 ANSWER c After a growing season of heavy tillage traffic across a soil, a property that is affected is: a) texture b) bulk density c) particle density d) consistence e) color ANSWER B From a biological point of view, the...