U organic u organic some nutrients are from the soil

This preview shows page 2 - 4 out of 4 pages.

U. organicU. organicSome nutrients are ________ from the soil and carried out of ecosystems by underground water flow to streams.F. leachedF. leachedThe element ________ is a basic constituent of all organic compounds and is involved in the fixation of energy by photosynthesis.D. carbonD. carbonThe difference between the rate of carbon uptake in photosynthesis and the rate of carbon loss due to S.ecosystemS.ecosystem
autotrophic and heterotrophic respiration is the net ________ productivity.Nitrogen is generally available to plants in only two forms:ammonium and ________.
 
 
Biological nitrogen fixation is accomplished by symbiotic ________ living in mutualistic association with plants.
 
 
Nitrogen can be returned to the atmosphere when certainbacteria convert it from nitrate into nitrogen gas, which isa process called ________.
Microbial decomposition of organic matter results in NH4+production through a process called ________.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture