•a person who studies nature, especially plants and animals as they live in nature

•When humans breed certain plants and animals for certain genetic characteristics

• the differences in characteristics between individuals of the same species

•caused either by genetic differences or the effect of environmental factors

• when animals blend in with their surroundings, so they are not seen by other living things.

•(1809-1882) was an English scientist who studied nature. He is known for his theory of evolution by natural selection.

the process where organisms with favorable traits are more likely to reproduce, they then pass on these traits to the next generation. Over time this process allows organisms to adapt to their environment.

•when one living thing resembles a different kind of living thing.

•This helps animals and plants to keep them from being eaten, or it can help them get food.

•only the strongest animals or things continue to live or be successful, while the others die or fail.