Flashcards
Evolutionary Patterns (3)
Cards in this deck (10)
- 1What is microevolution?Small-scale changes over short intervals
- 2What is macroevolution?-Large-scale chnages over long time intervals
- 3☼What is phylogeny?☼-Evolutionary tree, showing who is related to whom.
- 4☼What is convergent evolution?☼ Example?-Evolution of similar body plans in unrelated organisms.
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(Fish, mammal, reptile?) - 5☼What is divergent evolution?☼ Example?-Evolution of very different body plans in closely related organisms.
(Fork in road diagram)
(Darwin's finches [galapagos Islands]: Cichld fish [lake victoria]: hippos + whales [close related, different looking]) - 6☼What is parallel evolution?☼ Examples?-Independent evolution appearances of traits in 2 closely related lineages.
(Fork, then parallel lines)
(Flying frogs [acquired flight independently]) - 7☼What is reticulate evolution?☼ Examples?-Divergence and subsequent combination of two species.
(Fork; parallel; converge lines)
(AKA Hybridization) - 8☼What is phyletic gradualism?☼ (☼What is the difference between grad and equil?☼)-Evolution by slow, gradual steps.
(Darwin believed this)
(linear graph) - 9☼What is punctuated equilibrium?☼--Evoluation by relatively rapid change between intervals of stasis.
(Trilobites show this)
(stair-step graph) - 10What is punctuated gradualism?The combination of gradualism and equilibrium.
(Linear, then step: linear, step: etc.)