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Carrying Capacity

largest number of individuals of a population that a environment can support


A factor that limits a population more as population density increases. For example: A disease that spreads more easily among organisms in a dense population than in a less dense population


The amount of organisms of the same species living in an area

Zero Population Growth

when birth rate equals death rate


symbiotic relationship in which both species benefit


an organism that creates its own food and energy (not producer)


an organism that eats both plants and animals


the total mass of living matter in an organism

Carbon Cycle

the organic circulation of carbon from the atmosphere into organisms and back again

Cellular Respiration

process that releases energy by breaking down glucose and other food molecules in the presence of oxygen creates carbon dioxide and is made in cells(Plants and Animals)

sugar + oxygen -> carbon dioxide + water


any living thing

Death Rate

the ratio of deaths in an area to the population of that area


When the population has reached its carrying capacity


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


movement of individuals into an area occupied by an existing population(INTO)


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


the relation between two different kinds of organisms when one receives benefits from the other without damaging it


an organism that creates its own food and energy (not autotroph)


organism that obtains energy by eating other consumers

Food Chain

Simple Model to show how matter and energy move through an ecosystem through a specific path


non-living factor

Nitrogen Cycle

the circulation and reutilization of nitrogen in both inorganic and organic places.


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

carbon dioxide + water + sunlight -> oxygen + sugar


hunted organism or caught for food

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