Chapter 15

Darwin’s Theory of Evolution

Chapter 15

Darwin’s Theory of Evolution By James & ErikBy James & Erik

Voyage of the Beagle Voyage of the Beagle • Darwin went forth on the ship the

Beagle to the Galapagos islands to collect different animals and plants.

• Darwin went forth on the ship the Beagle to the Galapagos islands to collect different animals and plants.

Darwin’s observationsDarwin’s observations• Darwin observed that many species on

different islands had slight differences to help them survive

• Darwin observed that many species on different islands had slight differences to help them survive

Darwin’s bookDarwin’s book

• When Darwin went home after his trip he published a book called “On the Origin of Species”. Darwin’s new views not only challenge those of that time but disturbed even him.

• When Darwin went home after his trip he published a book called “On the Origin of Species”. Darwin’s new views not only challenge those of that time but disturbed even him.

Natural selectionNatural selection• Natural selection is the process in which

animals who are fit to the current environment live and pass on their genes while those who are not, die.

• Natural selection is the process in which animals who are fit to the current environment live and pass on their genes while those who are not, die.

Artificial selectionArtificial selection• Humans interfere with natural selection by

breeding animals to fit their needs. This is called artificial. The Pug is a good example of artificial selection.

• Humans interfere with natural selection by breeding animals to fit their needs. This is called artificial. The Pug is a good example of artificial selection.

Evidence of evolutionEvidence of evolution• Extinct animals, homologous structures, and

even the shape of the land is proof of evolution. It shows that the earth is changing all the time and that the creatures on it have too.

• Extinct animals, homologous structures, and even the shape of the land is proof of evolution. It shows that the earth is changing all the time and that the creatures on it have too.