B3 B 5.0 / 5 based on 1 rating ? BiologyGCSEAQA Created by: RachelCreated on: 12-05-13 12:29 Five important stores of carbon seas,lakes, rivers, peat bogs, and green plants 1 of 18 What is biodiversity? A range/variety of species in a habitat 2 of 18 What is deforestation? The cutting down of trees 3 of 18 Four reasons why deforestation occurs? used for timbre to build houses, wood is used to make paper, land for food production and land for growing crops for ethanol and other fuels 4 of 18 Four effects of deforestation reduced biodiversity, more methane in the atmosphere, more carbon dioxide in the atmosphere and less carbon dioxide is taken in by photosynthesis 5 of 18 Does fermentation involve aerobic or anaerobic respiration? anaerobic respiration 6 of 18 Two main components of bio-gas, and percentage? 70% methane and 30% carbon dioxide 7 of 18 What microorganism is the main source of mycoprotein? fusarium 8 of 18 Three ways to speed up food production? keep animals inside, keeps animals close together, reduce stages in the food chain 9 of 18 Give two ways that fish stocks can be conserved? fishing quotas and increase net size 10 of 18 Four main activities that use up land? human waste, quarrying, buildings and farming 11 of 18 Three possible consequences of global warming? change in migration patterns, sea levels rising due to ice caps melting and reduction in biodiversity 12 of 18 Why do biogas generators need to be kept at constant temperatures? To keep microorganisms respiring away 13 of 18 Why is mycoprotein good? don't require much space, cheap, quick process, microorganisms feed on waste material, readily availible 14 of 18 Two types of generators? batch - small scale, manually fed in Continuous - happens all the time and large scale 15 of 18 Four factors to consider when designing a generator convenience, cost, efficiency and position 16 of 18 Food miles bad? uses fossil fuels to transport --> global warming (increased carbon dioxide) :( 17 of 18 How is ethanol made? anaerobic fermentation of sugar (glucose) sugar cane juices are used or glucose is derived from maize starch using carbohydrase 18 of 18
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