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Honors Biology Chapter 5

speciespopulations that breed with their own kind
polymorphismcoexistence of 2 or more distinct forms of individuals in same population
morphismquality or state of having form
sexual dimorphismsignificant difference between male and female
variationdivergence in the characteristics of an organism from the species norm
sexual reproductionreproduction involving contribution of genetic material from two parents
varietyquality of having different forms
racesubdivision of species
straingroup with presumed common ancestry
sub speciescategory immediately below species named subdivision as race or variety
kingdomthe largest grouping in the biological classification system
homologieslikeness in form, as result of evolution from the same ancestors
comparative biochemistrystudying living matter by comparing the chemistry of the living matter
geographic isolationdivision/separation of a breeding population by physical barrier
Monerakingdom of bacteria and related microscopic organisms; prokaryotes
Protistakingdom of mostly aquatic, microscopic organisms; eukaryotic
Plantaethe plant kingdom
Fungikingdom of heterotrophic organisms
Animaliathe animal kingdom
isolating mechanisman aspect that prevents interbreeding
asexual reproductionmethod of reproduction that requires only one parent or parent cell
Archaebacteriaany of a class or a separate kingdom of primitive bacteria including methane-producing forms
dichotomous keya written set of choices that leads to the name of an organism
binomial nomenclaturetwo-wording system used in systematics or taxonomy
phylum2nd largest grouping after kingdom, in animals
division2nd largest grouping after kingdom, in plants
order4th largest biological classification group after kingdom
geneticsthe study of genes; inheritance
plasmidsmall ring of DNA bacteria; carries genes separate from chromosome
colonialexisting in a colony
multicellularcomposed of many cells
sessilepermanently attached or established
motilecapable of movement from place to place a characteristic of most animals
phylogenyevolutionary history of an organism
chitina hard organic substance secreted by insects and certain other invertebrates as the supporting material in their exoskeletons
taxonomystudy of species and their classification by genus, family, order, phylum or division, and kingdom
populationgroup of interbreeding organisms that represents the level of organization
class3rd largest group in biological classification after kingdom and phylum/division
family5th largest group in biological classification after kingdom, phylum/division, class, and order
genus6th largest group in biological classification after kingdom, phylum/division, class, order, and family

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