Evolution
Natural selection occurs when an individual’s characteristics for survival is selected by the environment.
“Survival of the fittest!!”
Visit the link below, look at 'The Big Picture' to have a good understanding of Evolution
http://www.sumanasinc.com/webcontent/animations/content/evolution/evolution.html
Look at 'Evolution in Action' tab to understand how theory is applied in the laboratory. Write a small paragraph on what you have learned from this task.
“Survival of the fittest!!”
Visit the link below, look at 'The Big Picture' to have a good understanding of Evolution
http://www.sumanasinc.com/webcontent/animations/content/evolution/evolution.html
Look at 'Evolution in Action' tab to understand how theory is applied in the laboratory. Write a small paragraph on what you have learned from this task.
Selecting Agents
The “fittest” organisms are ones who are less affected by these selecting agents.
Abiotic factors: heat, cold and wind, availability of oxygen, water, availability of living space
Abiotic factors: heat, cold and wind, availability of oxygen, water, availability of living space
Biotic factors: predators, diseases, competition between species and food availability
Formation of New Species
Organisms best adapted to the environmental change, survive and pass on good characteristics to their offspring. Changes in the environment affect the types of organisms living in those environments. Changes, such as weather patterns can cause short-term effects: flash floods, droughts, cyclones; or long-term effects: rise in sea levels, sudden earthquakes and volcanic activity. The movement of Earth plates cause change over a long period of time, often millions of years. If a population of rabbits lives on two sections of a forest and a river divides one population into two populations, the populations will be isolated from each other, and the environment will allow two populations to develop their characteristics and genetic make up differently. After a long time, there would emerge two different populations.