Darwin's Theory 3.0 / 5 based on 2 ratings ? BiologyEvolution, extinction and natural selectionGCSEOCR Created by: zayyanCreated on: 08-01-13 22:38 B3: Life On Earth Species are a group of organisms who can breed fertile offsprings Adaptation is key to survival When a species die out, it is called extinction When a species is at risk of extinction, they are called endangered New species can endanger others because of them being: competitive, predator, disease Food web shows interdependence Producers, consumers, decomposers, detritivores Energy is lost as you go up the chain because of: life process, heat energy, excreted, decomposers Carbon cycle is altered by: respiration, photosynthesis, combustion and decomposition Key words in a nitrogen cycle are: nitrogen fixation, nitrogen fixing bacteria, denitrifying bacteria and denitrification 1 of 1
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