— CHAPTER MASTERY · CLASS 12

Organisms and Populations Important Questions.

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Key Concepts in Organisms and Populations

Ecology: levels of organisation and ecological hierarchyHabitat, niche and competitive exclusion principlePopulation attributes: birth rate, death rate, age distribution pyramid, sex ratioPopulation growth models: exponential (J-curve) and logistic (S-curve); carrying capacity (K)Population interactions: mutualism, commensalism, parasitism, predation, competition, amensalism

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