Vallejo Science Unit B Chapter 2

20 terms by dannydougherty5 

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community

all the populations of organisms living together in an environment

consumer

organism in a community that must eat to get the energy it needs

decomposer

consumer that breaks down the tissues of dead organisms

ecosystem

a community and its physical environment together

endangered

term describing a population of organisms that is likely to become extinct if steps are not taken to save it

energy pyramid

shows the amount of energy available to pass from one level of a food chain to the next

exotic

imported or nonnative organism

extinct

no longer in existence; describes a species when the last individual of a population dies and that organism is gone forever.

food chain

the ways in which the organisms in an ecosystem interact with one another according to what they eat

food web

shows the interactions among many different food chains in a single ecosystem

habitat

place in an ecosystem where a population lives

instinct

behavior that organism inherits

learned behavior

behavior an animal learns from its parents

niche

the role each population has in its habitat

population

all the individuals of the same kind living in the same environment

producer

organism that makes its own food

symbiosis

long-term relationship between different kinds of organisms

threatened

describes a population of organisms that are likely to become endangered if they are not protected

competition

the contest among organisms for the limited resources of an ecosystem

individual

a single organism in an environment

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