EvolutionChanges in inherited characteristics of aSPECIES over time
Lamarcks Theory ofEvolution●Proposed by Jean Baptiste de Lamarck●Suggested that characteristics or traitsdeveloped during ...
Darwins Model of EvolutionPlants and animals on Coast of south Americanislands originally came from Central and SouthAmeri...
Natural Selection● Organisms with traits best suited totheir environment will more likelysurvive and reproduce.
Principles of Natural Selection● Overproduction● Variation● Adaptation
Overproduction● More offspring than can be supportedby the environment are producedtherefore many die●
Variation● Within a species there can be a variety of traits● Some variations are better for survival thanothers● Those wi...
Adaptation● Any variation that makes an organismbetter suited to its environment
Over Time● Genetic make up of species maychange● Environmental factors can causechanges in source of genes● Geographic iso...
Evolution
Evolution
Upcoming SlideShare
Loading in …5
×

Evolution

720 views

Published on

Grade 7 Evolution

Published in: Education, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
720
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
22
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Evolution

  1. 1. EvolutionChanges in inherited characteristics of aSPECIES over time
  2. 2. Lamarcks Theory ofEvolution●Proposed by Jean Baptiste de Lamarck●Suggested that characteristics or traitsdeveloped during an organisms lifetime and inherited by his offspring●His hypothesis was called inheritanceof acquired characteristic
  3. 3. Darwins Model of EvolutionPlants and animals on Coast of south Americanislands originally came from Central and SouthAmerica.Species of finches on the island looked similar tomainland finchesMembers of a population best able to surviveand reproduce will pass their traits to the nextgeneration resulting in differences in species.
  4. 4. Natural Selection● Organisms with traits best suited totheir environment will more likelysurvive and reproduce.
  5. 5. Principles of Natural Selection● Overproduction● Variation● Adaptation
  6. 6. Overproduction● More offspring than can be supportedby the environment are producedtherefore many die●
  7. 7. Variation● Within a species there can be a variety of traits● Some variations are better for survival thanothers● Those with better variations survive andreproduce
  8. 8. Adaptation● Any variation that makes an organismbetter suited to its environment
  9. 9. Over Time● Genetic make up of species maychange● Environmental factors can causechanges in source of genes● Geographic isolation can make twopopulations so different they becomedifferent species.

×