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the diversity of plant and animal life in a particular habitat (or in the world as a whole)


nonliving, physical features of the environment, including air, water, sunlight, soil, temperature, and climate


a major biotic community characterized by the dominant forms of plant life and the prevailing climate


operating or living or growing on land


an imaginary line around the Earth parallel to the equator


distance of something above a reference point (such as sea level)


the weather in some location averaged over some long period of time


combination of a bar and line graph showing annual precipitation and average temperatures


the responsive adjustment of a sense organ (as the eye) to varying conditions (as of light)

structural adaptation

a physical change of an organism's body having a specific function that contributes to the survival of the organism

physiological adaptations

Changes to an organisms metabolic or internal processes (Example - Bacteria becoming resistant to antibiotics)


changes to the behavior of an organism, helping it survive


the type of environment in which an organism or group normally lives or occurs


all the chemical substances that an organism needs to sustain life


process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches


a group of organisms of the same species in a given area


(ecology) a group of interdependent organisms inhabiting the same region and interacting with each other


of or relating to the science of ecology


(n.) any system of things or people arranged or graded one above another in order of rank


relationship in which two species live closely together


the relation between two different species of organisms that are interdependent


the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage)


(ecology) the status of an organism within its environment and community (affecting its survival as a species)


the struggle between organisms to survive in a habitat with limited resources


the act of preying by a predator who kills and eats the prey

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