Change Over Time Ms. DeLaney.

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Presentation transcript:

Change Over Time Ms. DeLaney

Quick Review Species

Habitat V Niche Habitat- WHERE you live Niche- Role you play Niche-smallest role of habitat. Made up of biotic and abiotic factors.

Natural Selection Charles Darwin- WHO IS THIS GUY?!

Charles Darwin Studied organisms on the Galapagos Islands Notice how far apart they are– animals may have travelled between them- explain for different species?!

Survival of the fittest? Charles Darwin Darwin wrote: The Origin of Species which presented the idea of Natural Selection Natural Selection? Survival of the fittest?

Darwin’s finches Darwin studied birds called finches on the Galapagos Islands: The finches showed VARIATION in SIZE and SHAPE of beaks. WHY????

Darwin’s Finches

THE PRESSUSE IS ON TO SURVIVE! Darwin’s finches Environment change = beak change Factors: Varied food Limited food (COMPETITION) SO…….. THE PRESSUSE IS ON TO SURVIVE! Varied beak size and shape so they could eat different foods. EACH finch species now occupies a different niche.

That’s a ton of variation! Shew!

Another Example Time: Industrial Revolution How many pepper moths can you see?

How many moths? Answer : 2

Fitness The moths ADAPTED to turn the darker color. This increased the moths FITNESS. What is the fitness of a mule?