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DSST Env.Sci. Chp. 2

vocab. for DSST Env.Sci. from Environmental Science by Karen Arms

abiotic factors nonliving parts of an ecosystem
adaptation an inherited trait that increases an organisms chance of survival and reproduction in a certain environment
biotic factors living parts of an ecosystem
coevolution two or more species evolving in response to each other
commensalism relationship between two species in which one species benefits and the other is neither harmed nor helped
community a group of interacting populations of different species
competition the relationship between species that attempt to use the same limited resource
ecosystem all living organisms in a certain area as well as their physical environment
evolution change in the genetic characteristics of a population from one generation to the next
extinction the irreversible disappearance of a population or a species
habitat place where an organism lives
host organism from which a parasite takes its nourishment
mutualism a relationship between two species in which both benefit
natural selection term used to describe the unequal survival and reproduction of organisms that results from the presence or absence of particular inherited traits
niche an organisms way of life
organism an individual living thing
parasite organism that lives in or on another organism and feeds on it without immediately killing it
parasitism the relationship between a parasite and its host
population a group of individuals of the same species living in a particular place
predation the act of killing and eating another organism
predator organism that kills and eats another organism
prey organism that is killed and eaten by a predator
remora small fish that cling to larger fish and other bodies by means of a sucking disc
resource anything that is ready for use or that can be drawn on for use by an organism
species a group of organisms that are able to produce fertile offspring and that resemble each other in appearance, behavior, and internal structure
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