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33 Cards in this Set
- Front
- Back
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individual
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A single organism in an environment.
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population
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All the individuals of the same kind living in the same environment.
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community
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All the populations of organisms living together in an environment.
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ecosystem
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A community and it's physical environment together.
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habitat
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A place in an ecosystem where a populations lives.
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niche
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The role each populations has in it's habitat.
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An ecosystem is made up of a _______________ and it's ________________?
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community physical environment
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Different organisms can share the same resource such as a tree, because they have different ____________.
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niches
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In a healthy ecosystem populations of living things are _______________. What does this mean?
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interdependent They depend on each other for survival.
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The types and number of animals in an ecosystem are determined by the types and numbers of plants. This is called?
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Limiting Factors
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producer
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uses sunlight to make food they need from carbon dioxide and water
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consumer
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The animals in a community.
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food chain
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Shows how the consumers in an ecosystem are connected to one another according to what they eat.
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decomposer
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Consumers that break down the tissues of dead organisms.
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food web
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Shows the relationships between many different food chains in a single ecosystem.
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energy pyramid
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Shows the amount of energy available to pass from one level of food chain the next.
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About _____% of energy at any level of a food chain is passed on to the next higher level.
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10
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competition
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A contest among organisms for these resources.
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symbiosis
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Along-term relationship between different kinds of organisms.
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instinct
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A behavior that an organism inherits.
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learned behavior
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Behaviors animals have learned from their parents not inherited from them.
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A cleaner fish and a shark are an example of ____________?
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mutualism
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In the cleaner fish and shark example both animals benefit how?
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cleaner fish gets food shark gets clean teeth
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Instinctive behaviors include?
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Building Shelters, Finding mates, Hunting prey
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Most declines in populations are caused by _____________?
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human activity
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Natural causes for decline are…
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floods, drought, hurricanes
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Extinction is
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Forever
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If an organism becomes extinct it does what?
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it disrupts the balance of the whole ecosystem it was a part of.
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In a healthy ecosystem, each population contributes to the ______ of the other populations.
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survival
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The amount of food is a __________ that affects population __________, or the number of individuals of a species in an ecosystem.
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limiting factor density
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Organisms listed as __________ have populations so small that they are likely to die out if steps aren't immediately taken to save them.
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endangered
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Organisms listed as __________ are likely t become endangered if they are not protected.
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threatened
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When the last individual of a population dies, that kind organism becomes _________.
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extinct
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