B3 (Life on Earth) - keywords 0.0 / 5 ? BiologyLife on EarthGCSEOCR Created by: Kayla FollettCreated on: 12-05-16 11:41 Species Similar organisms capable of interbreeding to produce fertile offspring. 1 of 29 Food chain A simple chain showing the feeding relationship between organisms in an ecosystem 2 of 29 Food web Interlinked food chains in an ecosystem. 3 of 29 Energy the ability to do work: measure in joules (J) 4 of 29 Photosynthesis The chemical process that takes place in green plants where water combines with carbon dioxides to produce glucose using light. 5 of 29 Ecosystem A term that refers to a physical environment, including the conditions there and the organisms that live there. 6 of 29 Autotroph An organism that makes it's own food. 7 of 29 Heterotroph An organism that is unable to make its own food; consumes other organisms. 8 of 29 Herbivore An organism that only eats plants, grass, etc; a primary consumer. 9 of 29 Carnivore An organism that eats other animals; a secondary or tertiary consumer. 10 of 29 Decomposer An organism that breaks down dead materials and waste products. 11 of 29 Detritivore An animal that feeds on dead materials. 12 of 29 Excretion The removal of waste products of cell reactions. 13 of 29 Nitrogen fixing The removal of nitrogen from the air. 14 of 29 Denitrification Taking nitrogen from materials, e.g, nitrates. 15 of 29 Combustion Burning in oxygen/air. 16 of 29 Indicator organism An organism that is only found in certain conditions. 17 of 29 Pollution Harmful additions to the environment. 18 of 29 Common ancestor The most recent individual from which all organism in a group are directly descended. 19 of 29 Fossil Animal/plant remains preserved in rock. 20 of 29 Evolution The gradual process of adaptation of a species over generations. 21 of 29 Theory of evolution The most likely scientific explanation, based on evidence, as to why organisms are the way they are. 22 of 29 Natural selection A natural process resulting in the evolution of organisms best adapted to the environment. 23 of 29 Mutation A spontaneous change in the genetic code of a cell. 24 of 29 Environmental variation Variation that occurs as a result of a certain factor in the surroundings. 25 of 29 Selective breeding The production if new varieties of animals and plants by artificial selection. 26 of 29 Extinction The process by which groups of organisms die out. 27 of 29 Biodiversity The range of species in an environment. 28 of 29 Kingdom A classification of a group of organisms with a small number of features in common. 29 of 29
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