Naturalselection


 * Darwin proposed the idea of natural selection in his book The Origin of Species.
 * He said natural selection is the process in which a species is better adapted to their environment and are more likely to survive and reproduce than others in their species.
 * Overproduction is when species produce too much offspring, there usually is not enough food,water, and space for all the animals to share.
 * For example a female sea turtle lays more than 100 eggs.
 * Competition is another way selective breeding occurs, because there is such little food and so many predators. Species must compete with each other to survive.
 * Variations occur in an ecosystem, some animals have better genes or adaptations which help or hurt them so they can get food easier or harder.
 * Selection occurs after a long period of time, a process of natural selection occurs.
 * Only a helpful variation survives and the unfavorable disappears altogethor.
 * For example more turtles now have the fast swimmer trait, because the fast turtles can survive and reproduce.
 * Natural selection is the reason all animals have different traits which benefit or hurt them as they are getting their food source.
 * Genes are passed from parents to offspring, which means traits can only be inherited not learned.
 * Natural selection can occur very quickly, like once the galapagos island had very little rain and after that year almost all finches had large beaks because the smaller beaked finches died that year because they could not survive with them.
 * [[image:http://evolutionwikispace.wikispaces.com/site/embedthumbnail/placeholder?w=267&h=188 width="267" height="188"]]