BIOL Ch. 42 Study Guide Test.

BIOL Ch. 42 Study Guide Test. The energy for nearly every organism in nearly every ecosystem ultimately comes from _____. View Available Hint(s) minerals in the soil the sun heat from Earth respiration decomposition - CORRECT ANSWER the sun Photosynthetic organisms are unique to most ecosystems because they convert light energy into matter. use light energy to synthesize organic compounds from inorganic compounds. use chemical energy to synthesize organic compounds. synthesize inorganic compounds from organic compounds. synthesize organic compounds they obtain from decaying heterotrophs. - CORRECT ANSWER use light energy to synthesize organic compounds from inorganic compounds. Nitrifying bacteria convert _____ to _____. nitrogen gas ... ammonium nitrogen gas ... nitrates ammonium ... nitrites nitrates ... nitrogen gas ammonium ... nitrogen gas - CORRECT ANSWER ammonium ... nitrites removes nitrogen from the atmosphere. Denitrification Nitrification Mineralization Nitrogen fixation Assimilation - CORRECT ANSWER Nitrogen fixation Assimilation is indicated by the letter(s) _____. The figure shows the nitrogen cycle. Each letter indicates the definite process of this cycle. Letter A indicates the process of uptake of nitrates by the plants. Letter B marks the transformation of ammonium into nitrites by bacteria. Letter C marks the synthesis of ammonium by the decomposers. Letter D marks the transformation of nitrogen of atmosphere to ammonium by bacteria. Letter E marks the single cell organisms, which take part in the nitrogen cycle and are located in the root nodules. D and E A B C and D C - CORRECT ANSWER A Nitrogen-fixing bacteria is(are) indicated by the letter(s) _____. The figure shows the nitrogen cycle. Each letter indicates the definite member of this cycle. Letter A indicates the bacteria, which convert nitrates to nitrogen and release it to the atmosphere. Letter B marks the bacteria, which transform nitrites into nitrates. Letter C marks bacteria, which transform ammonium into nitrites. Letter D marks bacteria, which transform nitrogen of atmosphere to ammonium. Letter E marks the bacteria, which assimilate the nitrogen of the air and are located in the root nodules. A B and C A and B C and D D and E - CORRECT ANSWER D and E