Galapogas Islands’ organisms
Giant Tortoises Blue Footed Booby
Iguana Sally Light Foot Crab
Similarities and Differences
Cormorant Galapagos Cormorant
Iguana Galapagos Iguana
Galapogas Finches
Evolution
• Darwin thought that species gradually changed over many generation and become better adapted to the new conditions.
Natural Selection
• The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.
Overproduction
• Most species produce far more offspring than can possibly survive.
Competition
• Organisms compete for resources like food, water, and space in order to survive and reproduce.
Variations
• Differences between individuals of the same species.
Selection• Over a long period of time, natural selection can lead to evolution. Helpful
variations gradually accumulate in a species while unfavorable ones disappear.
The case of the English Peppered Moth
• The industrial revolution of the 1700’s turned the trees black which favored the black variety.
New Species Formation• A new species can form when a group of individuals
remains separated from the rest of its species long enough to evolve different traits.
Kaibab SquirrelAbert Squirrel
Continental Drift
• Hundreds of millions of years ago, a supercontinent existed named Pangea. When the continents drifted apart, organisms became separated and evolved to survive in their new environment.