Phosphorus Has a Short Residence Time in Parent Material

Q21: Which of the following is not a

Q22: In the systems approach to biogeochemical cycles,<br>A)

Q23: Algal blooms are indicators of healthy nutrient

Q24: Eutrophication occurs when<br>A) trophic levels change.<br>B) nitrogen

Q25: Nitrogen fixation<br>A) is the product of respiration

Q27: Humus consists of the stable breakdown products

Q28: At the Hubbard Brook Experimental Forest stream

Q29: In a nutrient spiral,<br>A) nutrients are transported

Q30: Mutualistic bacteria in legumes<br>A) include the cyanobacteria.<br>B)

Q31: The increase in oxygen in the atmosphere<br>A)