2013 Hyundai Elantra Limited 4 Cyl 1.80L. Steering & Suspension - by Jenna Smith 10/7/2016. Thrumming and vibration under feet when driving Last week I noticed that my car started to have a thrumming noise and a vibration under my feet when driving over the speed of about 20 mph.
Adaptation - Definition. Any alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment. Traits - Definition.
An adaptation is a feature produced by natural selection for its current function. Based on this definition we can make specific predictions (If X is an adaptation for a particular function, then we'd predict that...) and see if our predictions match our observations. As an example, we'll consider the hypothesis: feathers are an adaptation for bird flight.