Natural selection clearly defined Evolution. Spieces changes there body compositions and behavior in response to the environmental conditions. This is undebatable since in human social lives clothes are determined by weathers found in Seasons. Mutation, alles frequency and gen flow brings in variations. If these are not affiliated in our lives. Everyone will look like (clone). This genetical identity would have caused a big concern for the living World. These are to some extent common sense. However Darwin's Theory to proof Natural Selection are not scientific at all.I am ever prepared to have a talk with scientists in this discipline.
Biology - Natural Selection: Introduction
Natural Selection: Introduction
If you look at members of the same species there are slight variations 
in structure, body functioning and behaviour. Some of these variations may
give a survival advantage to those who possess them. If these variations
are heritable - able to be passed on to the next generation - then the
frequency of these characteristics will increase in the population  over
successive generations. In stable and in changing environments  the
characteristics that better suit the individual to its environment will be
selected for and those that suit them less will be selected against. This
is referred to as natural selection. Evolution refers to changes that occur
in species over time. Mutations  are sources of new genetic information
and therefore provide the potential for change. Gene flow  resulting
from immigration and emigration of individuals (into and out of
populations) and new combinations of alleles  in meiosis  can
contribute to change in frequency of variations between individuals in a
population over successive generations.
Previous | Next
Log in to save your progress and obtain a certificate in Alison’s free Advanced Biology 2 online course
Sign up to save your progress and obtain a certificate in Alison’s free Advanced Biology 2 online course
Please enter you email address and we will mail you a link to reset your password.