BIOLOGY 1M03 Lecture Notes - Lecture 2: Chordate, Brassica Oleracea, Plant
8 Jan 2017
School
Department
Course
Professor
Document Summary
Friday january 6th lecture- mid chapter 1: biology and the tree of life (day 2) Concentrates reagents for biological reactions- compartmentalization was efficient and favoured by natural selection. Chemical gradients can be used to store energy- action potential of ions. Links a phenotype to the same space as the genotype that encodes it -allows natural selection to occur efficiently. Artificial selection, is a form of natural selection where humans drive the course of evolution- not naturally occuring. Repeating this process over generations results in changes in the characteristics of a domesticated population over time- takes time. Example: artificially breading of dogs- extending the phenotype of small dogs or with specific characteristics of interest pick the extremes, not randomly selected traits. Example: corn has been artificially selected to be large, yellow, sweet corn that we see today- used to be small and green.
