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Let’s Journey to the Galapagos Islands. What can weigh up to 700 pounds, live up to 188 years and can be ridden like a horse?. A Galapagos Tortoise. How did the tortoise get to Galapagos Islands? It was native to Equador some 600 miles away. On the HMS Beagle, a historic journey was made.
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What can weigh up to 700 pounds, live up to 188 years and can be ridden like a horse?
How did the tortoise get to Galapagos Islands? It was native to Equador some 600 miles away
On the Galapagos Islands Darwin found many interesting species: What is a species? • A group that have common characteristics and have the ability to reproduce
Some of the species that Darwin found: • The Marine Iguana
Darwin was convinced that Evolution had occurred What is Evolution? Gradual Change that is driven by Natural Selection Natural Selection(aka Survival of The Fittest) is when forms of life have traits that allow them to adapt therefore survive
Examples of species who have survived because of Natural Selection
3 things that effect Natural Selection • 1. Overproduction • 2. Competition • 3. Variation
Overproduction • Too many offspring are produced for the amount of resources available
Competition • Organisms compete for food, shelter, etc.
Variation • Variation is adaptation. • Organisms have the ability to 1. blend in (camouflage) 2. obtain food (sharp teeth, sense of smell, etc.) 3. Protection (quills, odors, etc.) 4. Helps it to move (speed, climbing, etc.) When adaptation occurs, is happens through generations.
How have these animals adapted? • Porcupine