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Chapter 2 Vocab

Biology

TermDefinition
ecology scientific study of all the interrelations between organisms and their environment.
biosphere relatively thin layer of Earth and its atmosphere that supports life.
abiotic factor any nonliving factor in an organism's environment, such as soil, water temperature, and light availability.
population group of organisms of the same species that occupy the same geographic place at the same time.
biological community all the interacting populations of different species that live in the same geographical location at the same time.
ecosystem biological community and all the nonliving factors that affect it.
biome large group of ecosystems that share the same climate and have similar types of communities.
habitat physical area in which an organism lives.
niche role or position, of an organism in its environment.
predation act of one organism feeding on another organism.
symbiosis close mutualistic, parasitic, commensal association between two or more species that live together.
mutualism symbiotic relationship in which both organisms benefit.
commensalism symbiotic relationship in which one organism benefits and the other is neither helped nor harmed.
parasitism symbiotic relationship in which one organism benefits at the expense of the other.
autotroph an organism that gathers energy from sunlight or inorganic substances.
heterotroph an organism that cant make its own nutrients so it feeds off of other organisms.
herbivore heterotroph that only feeds off of plants.
omnivore an organism that consumes both plants and animals.
detritivore a heterotroph that decomposes organic material and releases back out.
trophic level each step in a food chain or a food web
food chain simplified model that shows a single path of energy.
food web model that shows many interconnected food chains and pathways in which energy and matter flow
biomass total mass of living matter at each trophic level.
Created by: user-1579278
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