Darwin went on a voyage aboard the HMS Beagle to the Galapagos Islands where he observed that species on different islands had slight differences that helped them survive in their environments; after returning home, he published On the Origin of Species which introduced his theory of evolution by natural selection, wherein organisms better suited to their environment are more likely to survive and pass on their traits, while less suited organisms die off.

1. Chapter 15 Darwin’s Theory of Evolution By James & Erik

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

3. Darwin’s observations Darwin observed that many species on different islands had slight differences to help them survive

4. Darwin’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.

5. Natural 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.

6. 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.

7. Evidence 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.