Vocabulary
Survival of the fittest
What is Natural Selection?
Who is the scientist who had the idea of Natural Selection?
Who is Charles Darwin?
Adenine, Cytosine, Guanine and Thymine
What are the bases of DNA?
Name the four steps in speciation.
Variation, Isolation, competition and selection
Define Generation
Generation = the time between the birth of an individual and when that individual produces their own offspring.
A change in the DNA sequence
What is a mutation?
The ability of an organism to successfully reproduce
Fitness
True or False....
Only mutations that occur in reproductive cells contribute to evolution
TRUE
Identify the type of barriers that can be formed in isolation and give an example of each.
Geographical barriers such as mountains, lakes, rivers or gorges.
Climate barriers such as temperature, rainfall or salinity.
Define evolution
Evolution = a genetic change in the characteristics of a species overmany generations, resulting in the formation of new species.
Changes that occur to suit the environment
What is an adaptation?
The reason white peppered moths turned black
The Industrial Revolution
This is the most like outcome when a random mutation occurs during an animal's life
What is "no effect"
Explain some forms of competition that may occur
There is usually more members of a species than the environment cansupport. This leads to competition between members of a species forresources such as food or shelter, or to compete for a mate.
Explain hybridisation and give one example
closely related animals are actually capable of producing offspring.
Examples: ligar, zonkey, mule
Organisms change over long periods of time
What is evolution?
This is needed in order for fitter organisms to survive
competition
Mutations in gene pools increase this
biodiversity?
What is artificial selection?
The process by which we choose to breed particular organisms withdesirable features
Define Natural selection
the process where an environmental factor acts on a population and results in some individuals having more offspring than others. Survival of the fittest.