Evolution Flashcards
What is binomial nomenclature?
Naming of organisms
How do you do binomial nomenclature?
Genus and species, capitalize Genus and underline.
What does binomial nomenclature prevent?
Misnomers, misidentification
Explain Taxons
Category in which related organisms are placed
Name the hierarchy from broadest to narrowest
Domain Kingdom Phylum Class Order Family Genus Species
Name the 3 bases for modern Taxonomy
Homologous structures, similar embryos and molecular similarity
Define; sympatric speciation
Result of radical change in the genome that produces a reproductively isolated sub population.
Name and explain the 2 Interpretations of Speciation theories
Gradualist model; slow change
Punctuated equilibrium; sudden change
Define; convergent evolution
Species from different branches may come to resemble one another if they live in similar environments
Define; convolution
One species acts as a selective force on a second species
List and explain the 3 selections
Stabilizing selection; intermediate is favored
Directional selection; favors variants of one extreme
Disruptive selection; opposite extremes favored
Name and explain 5 prexy gothic barriers
Temporal- breeding occurs at different times
Habitat- occurs in different habitats
Behavioral- not attracted to
Mechanical- structural differences prevent gamete exchange
Gametic- gametes die before they unite with other gametes
List and explain 3 post-zygotic barriers
Hybrid inviability- zygotes don’t reach sexual maturity
Hybrid sterility- doesn’t produce functional gametes
Hybrid breakdown- offspring are weak or infertile
Define; allopatric speciation
When ancestral population becomes separated by geographical barriers
Define;Adaptive radiation
Emergence of numerous species from a common ancestor introduced to new environments
