This is what I wrote for my response:
Natural selection occurs when populations have genetic variation. Genetic variation is caused by random mutations in the genes of organisms. A mutation results in different alleles for a gene and these different alleles will cause adaptations that may be favorable or unfavorable. If no species in an area has adaptations suited for the environment after it changes, extinction will occur.
Edg asks for what you included in your response. The details that Edg suggests to include are:
-Adaptations result from random mutations in the genes of organisms.
-Adaptations may be favorable or unfavorable depending on the environment.
-If an adaptation is favorable, it is selected by nature and, over time, more and more organisms in a population will have it.
-If the environment changes so much that the adaptations of a species are no longer enough for the species to survive, extinction will occur.
Hope this helped!
