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15 Cards in this Set

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What is a model that shows the amount of energy available at each level of an ecosystem?
energy pyramid
What do we call the struggle among organisms to survive in a habitat with limited resources?
competition
What do we call a close, long-term relationship between organisms that benefits at least one of the organisms?
symbiosis
What do we call an organism that benefits from symbiosis?
parasite
What do we call an organism that is harmed in symbiosis?
host
What is a series of predictable changes that occur in an ecosystem over time?
succession
What is a word for all the conditions that surround a living thing?
environment
What is a group of individuals that belong to the same species and live in the same area?
population
What is a group of populations that interact with each other in a particular area?
community
What is an area in which living things and nonliving parts of the environment interact?
ecosystem
What do we call the nonliving parts of an ecosystem?
abiotic factor
What do we call the living organisms in an ecosystem?
biotic factor
What is a large group of ecosystems with similar climates and organisms?
biome
What is an organism that breaks down the chemicals from dead organisms and returns materials to the environment?
decomposer
What do we call it when all living individuals of a species have died?
extinction