What is natural selection?
Natural selection in action: the Peppered moth Show
A pale peppered moth on an oak tree. Image credit: Shutterstock
A pale peppered
moth on a dark tree. What have genes got to do with it?
Different types of evolutionConvergent evolution
Co-evolution
Adaptive radiation
Sketches of the heads of finches from the Galapagos Islands showing the differences in their beak shapes due to evolution. Image credit: John Gould (14.Sep.1804 – 3.Feb.1881) – From “Voyage of the Beagle”; also online through Biodiversity This page was last updated on 2017-02-17 Why is the theory of evolution through natural selection considered a scientific theory?Natural selection provides the outline of an explanatory theory." Biologists consider it to be a scientific fact that evolution has occurred in that modern organisms differ from past forms, and evolution is still occurring with discernible differences between organisms and their descendants.
Why is evolution by natural selection considered a theory quizlet?Evolution is referred to as a theory because it is a well- supported explanation of phenomena that have occurred in the natural world.
Why is Darwin's theory of evolution considered a scientific theory quizlet?Darwin's ideas are classified as scientific theory because it is well-tested concept that explains a wide range of observations. For example, he compared organisms and how they had adapted to their environments. The finches had different beak sizes based on the food they ate.
What does it mean to describe evolution as a scientific theory?The theory of evolution is based on the idea that all species? are related and gradually change over time. Evolution relies on there being genetic variation? in a population which affects the physical characteristics (phenotype) of an organism.
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