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Unit 7

AP Biology Unit 7 Vocabulary - Garcia

TermDefinition
Adaptation Inherited characteristics that enhance the ability of an organism to survive and reproduce in a particular environment.
Bottleneck Effect Genetic drift resulting from the reduction of a population, typically by a natural disaster, such that the surviving population is no longer genetically representative of the original population.
Common Ancestor Or concestor of a set of organisms is the most recent individual from which all the organisms of the set are descended.
Cladogram A diagram depicting patterns of shared characteristics among taxa.
Evolution All the changes that have transformed life on Earth from its earliest beginnings to the diversity that characterizes it today.
Gene Flow Genetic additions to or substractions from a population resulting from the movement of fertile individuals or gametes.
Gene Pool The total aggregate of genes in a population at any one time.
Genetic Drift Unpredictable fluctuations in allele frequencies from one generation to the next because of a population’s finite size.
Geographic Isolation Occurs when two populations of the same species are divided by some type of geographic event or object.
Fitness Simply means reproductive success and reflects how well an organism is adapted to its environment.
Hardy-Weinberg Equilibrium The condition describing a non-evolving population (one that is in genetic equilibrium).
Natural Selection Differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment.
Morphology The branch of biology that deals with the form of living organisms, and with relationships between their structures.
Phylogenetic Tree A diagram that represents evolutionary relationships among organisms.
Reproductive Isolation Among sexual organisms, individuals that are able to interbreed belong to the same species.
Speciation The origin of new species in evolution.
Variation Differences between members of the same species.
Created by: Nataly Garcia
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