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BJU Life Science 17

Bob Jones Life Science - Chapter 17

food chain The passing of material and energy from one organism to another
food web An illustration of the interrelationships between food chains in an ecosystem
ecological pyramid A diagram divided into layers to show the energy relationships between organisms in an ecosystem
trophic level A level in an ecological pyramid that shows the flow of energy through a food chain and that is dependent on the level below it for energy
animal society A group of animals of the same species that live together
social insect Insects that live in a colony and are organized into classes
competition The struggle among organisms for an essential factor that is in short supply in the environment
predator An animal that kills and feeds on other animals
prey An animal that a predator eats
commensalism A relationship between organisms of different species in which one organism benefits and the other is not helped or harmed
scavenger An animal that eats dead animals
epiphyte A plant that grows on the outside of another plant but does not take nourishment from the plant on which it grows
mutualism A symbiotic relationship between organisms of different species that is beneficial to both organisms
parasite An organism that obtains nourishment from and harms (but usually does not kill) another organism
host An organism that provides nourishment for and is harmed (but not usually killed) by another organism, such as a parasite
Created by: heidio



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