Standard 5.3 Explain how evolution through natural selection can result in changes in biodiversity through the increase or decrease of genetic diversity within a population.
Vocabulary
Tier 3
Charles Darwin - originator of the theory of evolution
Galapagos islands - islands where Darwin saw evolution in action
Artificial selection - when humans select traits to breed
Natural selection - when nature selects traits for survival
Sexual selection - when males show off to females who choose them
Biodiversity - different types of organisms
Adaptation - when organisms adapt over time to fit their environment
Tree of life - shows that all life is related
Ancestor-
Advantageous-
Trait-
Essential Questions
1. How does natural selection allow species to adapt uniquely for their specific environments?
2. Why do islands, like the Galapagos, show such cool evolution?
Charles Darwin
* British Naturalist who journeyed around the world on The Beagle
* He came up with the theory of Evolution, with some help (from his Grandpa)
* He went to the Galapagos Islands where he saw many animals that gave him evidence of his theory
Darwin came up with the idea of SELECTION:
1. Artificial selection: humans choose which animals survive and pass their traits on to the next generation. This creates domesticated animals such as dogs, chickens, cows, sheep, etc. WE INVENTED DOGS!
2. Natural Selection: When the environment selects which animals survive or die
1. all organisms must compete for resources
2. only the most fit individuals survive and reproduce
3. this creates adaptation to the environment
4. new species are formed from older ancestors over time
3. Sexual Selection: Males must impress females. Females choose the most fit male to get the best genes
* He came up with the theory of Evolution, with some help (from his Grandpa)
* He went to the Galapagos Islands where he saw many animals that gave him evidence of his theory
Darwin came up with the idea of SELECTION:
1. Artificial selection: humans choose which animals survive and pass their traits on to the next generation. This creates domesticated animals such as dogs, chickens, cows, sheep, etc. WE INVENTED DOGS!
2. Natural Selection: When the environment selects which animals survive or die
1. all organisms must compete for resources
2. only the most fit individuals survive and reproduce
3. this creates adaptation to the environment
4. new species are formed from older ancestors over time
3. Sexual Selection: Males must impress females. Females choose the most fit male to get the best genes