Limitations of Pyramid of Numbers - Doesn’t take size of organisms into account, Biotic Factors - Living factors, Competition - Is the way organisms struggle for resources in short supply, Contest competition - Where 2 organisms struggle for a resource& only 1 wins, Scramble competition - All organisms get some of the resource, Adaptations - A structural (or behavioral) feature to help survival, Symbiosis - A relationship between species where both benefit, Parasitism - A relationship between species involving harm, Predation - The catching, killing & eating of another animal, Role of Predation - Population control, Factors affecting Human Population Growth - War, famine & disease, Biological Control - Use of 1 species to control another, Invasive (Exotic) Species - Species that have adapted after been introduced to a new habitat, Reasons for introduction of Invasive Species - Aesthetic & food,

05 Ecology Higher Level

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