Set: Biology - Ch. 2

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All 20 Terms

Term Definition
abiotic factor nonliving parts of an organism's environment: air currents, temperature, moisture, light and soil are examples
biological community a community made up of interacting populations in a certain area at a certain time
biosphere portion of Earth that supports life; extends from high in the atmosphere to the bottom of the oceans
biotic factor all the living organisms that inhabit an environment
commensalism symbiotic relationship in which one species benefits and the other species is neither harmed nor benefited
ecology scientific study of interactions between organisms and their environment
ecosystem interactions among populations in a community: the community's physical surroundings, or abiotic factors
habitat place where an organism lives out its life
mutualism a symbiotic relationship in which both species benefit
niche role or position a species has in its environment; includes all biotic and abiotic interactions as an animal meets its needs for survival and reproduction
parasitism symbiotic relationship in which one organism benefits at the expense of another, usually another species
population group of organisms all of the same species which interbreed and live in the same place at the same time
symbiosis permanent, close association between two or more organisms of different species
autotroph organisms that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients
biomass the total mass or weight of all living matter in a given area
decomposer organisms, such as fungi and bacteria, that break down and absorb nutrients from dead organisms
food chain simple model that shows how matter and energy move through an eccosystem
food web model that shows all the possible feeding relationships at each trophic level in a community
heterotroph organisms that cannot make their own food and must feed on other organisms for energy and nutrients
trophic level organism that represents a feeding step in the movement of energy and materials through an ecosystem

Set Information

Terms 20
Creator fabiology
Created May 21, 2008
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Most Missed Words

  1. trophic level → organism that represents a feeding step in the movement of energy and materials through an ecosystem - 55 misses
  2. ecosystem → interactions among populations in a community: the community's physical surroundings, or abiotic factors - 52 misses
  3. symbiosis → permanent, close association between two or more organisms of different species - 50 misses
  4. biological community → a community made up of interacting populations in a certain area at a certain time - 47 misses
  5. commensalism → symbiotic relationship in which one species benefits and the other species is neither harmed nor benefited - 41 misses
  6. biotic factor → all the living organisms that inhabit an environment - 40 misses
  7. heterotroph → organisms that cannot make their own food and must feed on other organisms for energy and nutrients - 35 misses