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Evolution

Bio 11

TermDefinition
complementary base pairing Pairing of complementary nitrogenous bases between two strands of the DNA molecule
convergent evolution Convergent evolution describes the independent evolution of similar features in species of different lineages
divergent evolution is the accumulation of differences between groups which can lead to the formation of new species
deoxyribonucleic acid (DNA) a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
double helix a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule
evolutionary change changes in the genes controlling devolvement
gene flow is the transfer of alleles or genes from one population to another
genetic drift variation in the relative frequency of different genotypes in a small population
gradual change model species originate by slight morphologies over long time spans
mutation the changing of the structure of a gene, resulting in a variant form which may be transmitted to subsequent generations, caused by the alteration of single base units in DNA
natural selection the process whereby organisms better adapted to their environment tend to survive and produce more offspring
nitrogenous base is a nitrogen containing organic molecule having the chemical properties of a base
non-random mating Any mating system in which males are not randomly assigned to females
punctuated equilibrium model theory in evolutionary biology - proposes most species will exhibit little net evolutionary change.
speciation the formation of new and distinct species in the course of evolution
sugar-phosphate backbone is the major structural component of the DNA molecule
Created by: jakemcneill
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