7.2 Vocabulary Flashcards Preview

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Flashcards in 7.2 Vocabulary Deck (35):
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Adaptation

Characteristic that increases an organism's chance of survival in its habitat

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Biological clock

Inner mechanism that regulates an organism's biological rhythms

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Biomass

Total dry weight of all the living organisms in an ecosystem

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Carnivores

Animals that eat other animals

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Circadian rhythms

Regular rhythms of growth and activity that occur in approximately 24 hour cycles

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Commensalism

Relationship between 2 organisms in which one organism benefits and the other is not affected

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Consumers

Organisms that eat other organisms

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Decomposers

Organisms that get their energy by breaking down the remains of dead organisms or animal wastes

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Detritivores

Organisms that feed on dead matter

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Ecological succession

Process of gradual change in an ecosystem

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Food chain

Food and energy links in a community

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Food web

Network of food chains in an ecosystem

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Herbivores

Animals that eat plants

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Hibernation

A period of inactivity that some animals enter in response to cold environmental conditions

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Host

Organism on which a parasite depends

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Interspecific competition

Competition within a species

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Intraspecific competition

Competition within a community

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Moment-of-truth defense

Behavior used by prey to startle the predator, giving the prey a chance to escape

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Mutualism

Relationship between 2 organisms that live and work together for the benefit of both

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Niche

Organism's unique role in its environment

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Omnivores

Animals that eat both plants and animals

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Parasite

Organism that depends on another living organism an lives in, on, or near that organism

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Predator

Organism that eats other living organisms but does not live on or in its prey

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Prey

Organism eaten by a predator

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Primary consumers

Herbivores

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Primary succession

Establishment of plants on land that never before had vegetation

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Producers

Organisms that use photosynthesis to make their own food

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Resource partitioning

Adaptations of feeding habits or other behaviors to avoid direct competition with other organisms

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Scavengers

Animals that feed on the bodies of dead animals

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Secondary consumers

(Primary carnivores)
Animals that eat herbivores

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Secondary succession

Establishment of plants on land that has been disturbed

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Symbiosis

Relationship in which one organism lives on, near, or inside another organism and at least one organism benefits

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Tertiary consumers

(Secondary carnivores)
Animals that eat primary carnivores

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Top carnivores

(Top predators)
Animals that have no predators when they are healthy adults

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Trophic level

Group of organisms that share the same position in a food chain