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Evolution and Systematics

Across
a physical structure present in an organism but that has no apparent function and appears to be from a functional structure in a distant ancestor
evolutionary history and relationship of an organism or group of organisms
a group of taxa containing and ancestor and some but not all of its descendants
a group of taxa containing an ancestor and all of its descendants
a group of taxa with the same set of shared derived characters including an ancestral species and all its descendants
the changes in a population’s genetic structure (i.e. allele frequency)
the science of determining the evolutionary relationships of organisms
speciation that occurs via a geographic separation
a structure that is similar because of evolution in response to similar selection pressures resulting in convergent evolution not similar because of descent from a common ancestor
Down
formation of a new species
broad scale of evolutionary changes seen over paleontological time
evolution that results in similar forms on different species
the science of classifying organisms
a single level in the taxonomic classification system