• Like
1.1
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Published

 

Published in Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
467
On SlideShare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
9
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. AIM: How does evolution explain the diversity in the world? Warm – up: Give your definition of “evolution”
  • 2. What is Evolution? n Species living today are descended from species that lived in the past. n Evolution is the change over time in the heritable characteristics in a population from simple to complex.
  • 3. Charles Darwin
  • 4. Charles Darwin n Naturalist on HMS Beagle (1831 – 1836)
  • 5. Charles Darwin n Naturalist on HMS Beagle (1831 – 1836) n Observed the coastline of South America
  • 6. Charles Darwin n Naturalist on HMS Beagle (1831 – 1836) n Observed the coastline of South America n Explored and observed organisms on the Galapagos Islands
  • 7. Charles Darwin n Naturalist on HMS Beagle (1831 – 1836) n Observed the coastline of South America n Explored and observed organisms on the Galapagos Islands n Compared his observations between the two areas which led him to develop his idea of natural selection.
  • 8. Charles Darwin n Naturalist on HMS Beagle (1831 – 1836) n Observed the coastline of South America n Explored and observed organisms on the Galapagos Islands n Compared his observations between the two areas which led him to develop his idea of natural selection. n Believed all species evolved from 1 ancestral type (common origins)
  • 9. Theory of Natural Selection
  • 10. Theory of Natural Selection n Natural variation: In a population, there are organisms with varying characteristics that are able to be inherited by offspring.
  • 11. Theory of Natural Selection n Natural variation: In a population, there are organisms with varying characteristics that are able to be inherited by offspring. n Overproduction: Organisms produce more offspring that are required to replace their parents and that can possibly survive.
  • 12. Theory of Natural Selection n Natural variation: In a population, there are organisms with varying characteristics that are able to be inherited by offspring. n Overproduction: Organisms produce more offspring that are required to replace their parents and that can possibly survive. n Stabilization: Populations remain relatively constant with no population getting indefinitely large.
  • 13. Theory of Natural Selection n Natural variation: In a population, there are organisms with varying characteristics that are able to be inherited by offspring. n Overproduction: Organisms produce more offspring that are required to replace their parents and that can possibly survive. n Stabilization: Populations remain relatively constant with no population getting indefinitely large. n Struggle for Existence: Competition for limited resources, struggle to avoid predation and disease.
  • 14. Theory of Natural Selection n Natural variation: In a population, there are organisms with varying characteristics that are able to be inherited by offspring. n Overproduction: Organisms produce more offspring that are required to replace their parents and that can possibly survive. n Stabilization: Populations remain relatively constant with no population getting indefinitely large. n Struggle for Existence: Competition for limited resources, struggle to avoid predation and disease. n Survival of the Fittest: Individuals that are best adapted to their environment will have a selective advantage.
  • 15. Theory of Natural Selection n Natural variation: In a population, there are organisms with varying characteristics that are able to be inherited by offspring. n Overproduction: Organisms produce more offspring that are required to replace their parents and that can possibly survive. n Stabilization: Populations remain relatively constant with no population getting indefinitely large. n Struggle for Existence: Competition for limited resources, struggle to avoid predation and disease. n Survival of the Fittest: Individuals that are best adapted to their environment will have a selective advantage. n Selective Advantage: More likely to survive and reproduce than other less well-adapted organisms.
  • 16. Neo - Darwinism n Incorporation of new scientific evidence (genetics & molecular biology) n Has shown that natural variation stems from mutations in reproductive cells