nitrogen cycle

• why is nitrogen important to all living organisms


  amino acids for protein synthesis, nitrogenous bases in nucleotides and chlorophyll
• what is the nitrogen cycle


  this is the flow of organic and inorganic nitrogen within abiotic and biotic components of an ecosystem
• how does nitrogen enter the food chain


  when plants absorb ammonia or nitrite ions to the roots
• what happens to nitrogen ions and ammonia that is in the roots of plants and how is it passed into the next stage of the food chain


  nitrogenous compounds are passed on when the animals consume the plants
• by which process for nitrate ions get taken up by the plant roots


  facilitated diffusion or active transport
• name two pathways that the nitrogen ions can take when traveling through the cortex out of plant root


  symplast and apoplast pathway
• what is meant by the symplast pathway


  water and ions move to the cytoplasm and the plasmodesmata
• what is meant by the Apoplast pathway


  water and ions move through the cell walls
• what are the five main processes in the nitrogen cycle


  ammonification nitrification nitrogen fixation assimilation denitrification