Intro to Evolutionary Biology Flashcards
two core tenets of evolution
1) Living things change over time
2) Adaptations have arisen through natural selection
important conclusions about evolution verified by scientific study
Organisms on Earth have changed through time
* The changes are gradual not instantaneous
* Lineages split by speciation, resulting in the generation of biodiversity
* All species have a common ancestor
* Adaptations result from natural selection
what are the 2 products of evolution
biodiversity and adaptation
biodiversity
-the diversity of life on earth
-the number and kinds of living organisms in a given area
adaptation
-Any trait that makes an organism better able to survive or reproduce in a given environ. [as a noun]
* The evolutionary process that leads to the origin and maintenance of such traits [as a verb]
microevolution
evolutionary patterns and processes observed WITHIN species
macroevolution
evolutionary patterns and processes observed AMONG species