Natural Selection vs.
Environmental and Human Influences
Natural Selection Selective Breeding
Process by which organisms that are
most suited to their environment survive and reproduce most successfully.
Method of breeding that allows only those organisms with desired
characteristics to produce the next generation.
Natural Selection vs. Selective Breeding
Fittest: Lives long enough to reproduce
Do you remember these guys?
The adaptation of a population in response to pollution.
“Industrial Melanism”- darkness- of the skin, feathers, or fur. Acquired by a population of animals living in an industrial region where the environment is soot-darkened.
Manchester, England from
1845 to 1890.
Before the industrial revolution, the trunks of the trees in the forest around
Manchester were light grayish-green due to the presence of lichens.
Most of the peppered moths in the area were light colored with dark spots.
As the industrial revolution progressed, the tree trunks became covered with soot and turned dark.
Over a period of 45 years, the dark variety of the peppered moth became more common.
Influence due to organism adaptation.
Mouth parts ex: beaks, teeth
ex: fur, scales, feathers
Darwin described how organisms might change over time.
Theory of Evolution
5 years of observations on the islands.
Summary: Human Influence on characteristics and behavior .
◦ Ex: Chickens, Dogs, Cows
◦ Ex: Corn, Brasilica, Fruit hybrids https://www.youtube.com/watch?v=W_CnR0A k604&index=2&list=PLgr6dnNbT5pG7CKfkScfNEDWjeUZr9FI
Various animals that have been tamed and made fit for a human environment.
How many types of apples are there?