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Natural Selection and Adaptation
Natural Selection and Adaptation
Monday, April 12, 2010
Natural selection is the process by which those heritable traits that make it more likely for an organism to survive and successfully reproduce become more common in a population over successive generations.
Monday, April 12, 2010
Often used in conjunction with the phrase survival of the fittest. A fit organism is said to have a
reproductive advantage in a population.
Monday, April 12, 2010
Often used in conjunction with the phrase survival of the fittest. A fit organism is said to have a
reproductive advantage in a population.
What happens to an organism that fails to reproduce?
Monday, April 12, 2010
Introduced by Charles Darwin in his 1859 book On the Origin of Species.
Monday, April 12, 2010
Introduced by Charles Darwin in his 1859 book On the Origin of Species.
Monday, April 12, 2010
Introduced by Charles Darwin in his 1859 book On the Origin of Species.
Monday, April 12, 2010
Introduced by Charles Darwin in his 1859 book On the Origin of Species.
Remember: 1859 was well before the discovery of DNA as hereditary material.
Monday, April 12, 2010
Examples of natural selection...
Monday, April 12, 2010
Examples of natural selection...
Monday, April 12, 2010
Examples of natural selection...
Monday, April 12, 2010
Examples of natural selection...
Monday, April 12, 2010
Examples of natural selection...
Monday, April 12, 2010
Examples of natural selection...
Monday, April 12, 2010
Examples of natural selection...
Monday, April 12, 2010
Natural Selection has been used by many scientists to describe the biodiversity seen on our planet.
Monday, April 12, 2010
It has also been used to explain speciation (the evolution of new species of organisms)
Monday, April 12, 2010
The radicalism of natural selection lay in its power to dethrone some of the deepest and most tradition comforts of Western thought.
-Stephen Jay Gould
Monday, April 12, 2010
Symbiosis is the process by which
an organism may coevolve to interact closely with another organism.
Monday, April 12, 2010
Mutualism results in both organisms
benefiting from the relationship.
Monday, April 12, 2010
Mutualism results in both organisms
benefiting from the relationship.
Monday, April 12, 2010
Mutualism results in both organisms
benefiting from the relationship.
Monday, April 12, 2010
Mutualism results in both organisms
benefiting from the relationship.
Monday, April 12, 2010
Commensalism results in one organism
benefiting and one being unaffected in a relationship.
Monday, April 12, 2010
Commensalism results in one organism
benefiting and one being unaffected in a relationship.
Monday, April 12, 2010
Commensalism results in one organism
benefiting and one being unaffected in a relationship.
Monday, April 12, 2010
Commensalism results in one organism
benefiting and one being unaffected in a relationship.
Monday, April 12, 2010
Parasitism is a relationship in which one
organism benefits and one is harmed
Monday, April 12, 2010
Parasitism is a relationship in which one
organism benefits and one is harmed
Monday, April 12, 2010
Parasitism is a relationship in which one
organism benefits and one is harmed
Monday, April 12, 2010
Parasitism is a relationship in which one
organism benefits and one is harmed
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Food
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Food
Predation
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Food
Predation
Disaster
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Food
Predation
DisasterSpace
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Food
Predation
DisasterSpace
Sunlight
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Food
Predation
DisasterSpace
Sunlight
Disease
Monday, April 12, 2010
There are many limiting factors that influence populations of organisms in an ecosystem...
Food
Predation
DisasterSpace
Sunlight
Disease
Shelter
Monday, April 12, 2010
Many other factors may influence natural selection in an ecosystem...
Monday, April 12, 2010
Many other factors may influence natural selection in an ecosystem...
Hunting
Monday, April 12, 2010
Many other factors may influence natural selection in an ecosystem...
Hunting
PollutionMonday, April 12, 2010
Many other factors may influence natural selection in an ecosystem...
Hunting
PollutionForest Fires
Monday, April 12, 2010
Many other factors may influence natural selection in an ecosystem...
Hunting
PollutionForest Fires
Deforestation
Monday, April 12, 2010
Many other factors may influence natural selection in an ecosystem...
Hunting
PollutionForest Fires
Deforestation
Introduction of new species
Monday, April 12, 2010
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