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South Habersham Middle School 7th Grade Science Powertime Vocabulary Unit 3

Mutualism A relationship between two species of organisms inwhich both benefit from the association.
Commensalism A type of relationship between two species of aplant, animal, fungus, etc., in which one lives with, on, or in another without damage to either.
Parasitism A symbiotic relationship in which one organism (the parasite)benefits and the other (the host) is generally harmed.
Evolution Change in the gene pool of a population from generation to generation by such processes as mutation,natural selection, and genetic drift.
Adaptation Any alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment.
Natural Selection The process by which forms of life having traits that better enable them to adapt to specific environmental pressures will tend to survive and reproduce in greater numbers than others of their kind ensuring continuation of favorable traits.
Symbiosis An interaction between individuals of different biological species. At least one of the organisms receives a benefit from the interaction. The other organism can either receive a benefit, be harmed, or not be affected in any way.
Competition The struggle between individuals of the same or different species for food, space, light, etc, when these are inadequate to supply the needs of all.
Diversity Variety
Classification The assignment of organisms to groups within a system of categories distinguished by structure, origin, etc.The usual series of categories is phylum (or, especially in botany, division ), class, order, family, genus, species, and variety.
Created by: hbogue