Energy and ecosystems 0.0 / 5 ? BiologyEcology, ecosystems and environmental biologyA2/A-levelAQA Created by: ellajxdieCreated on: 17-05-18 19:34 What three categories can organisms be divided into? Producer, consumer, saprobionts 1 of 9 Why is energy lost between stages of a food chain some parts of organisms consumed, not all can be consumed, some energy is lost through respiration 2 of 9 What are the main stages of the nitrogen cycle Nitrogen fixation, ammonification, nitrification, denitrification 3 of 9 Define ammonification The production of ammonia from organic nitrogen-containing compounds. 4 of 9 What are the stages of nitrification? oxidation of ammonia to nitrites, oxidation of nitrites to nitrates 5 of 9 What are the types of bacteria that can carry out nitrogen fixation? free-living nitrogen-fixing bacteria, mutualistic bacteria 6 of 9 What are the stores of phosphate in the phosphorous cycle? Phosphate ions in waste/remains, phosphates in rock, phosphate ions in plants, phosphate ions in animals, phosphate ions in water 7 of 9 What are the negative impacts of fertiliser use? Lack of species diversity, leaching, eutrophication 8 of 9 What is the overall outcome of eutrophication? Death of plants and animals & the water becomes putrid as a result of anaerobic microorganisms 9 of 9
Comments
No comments have yet been made