Natural Selection
What is natural selection?
Species that are best adapted to their environment are able to reproduce
survival of the _____
Fittest
What is evolution?
process by organism gradual change over time.
Give an example of a vestigial structure.
Answers may vary.
A population of rabbits come in brown and white fur. In their environment the weather changes and there is less snow. The land becomes more brown. Which color of rabbits is more fit for this new environment?
Brown fur
What is an adaptation?
Any inherited characteristic that increases an organisms chance of survival
Are mutations random?
Yes
Founder of evolution
polar bears and grizzly bears now have share some habitats because of?
Climate Change
A population of rabbits come in brown and white fur. In their environment the weather changes and there is less snow. The land becomes more brown. A genetic mutation occurs in the rabbit population creating grey rabbits. Grey can blend well in both snow and dirt. Predict what will happen with the rabbit population.
Grey rabbits will become more common.
If a species cannot adapt to its environment, what will happen?
Extinction
Humans participating in selection through selective breeding of plants and animals.
Features in different species sharing a common evolutionary origin are also known as:
How do fossils provide evidence of evolution?
Fossils show how an organisms have changed over time.
In an arctic habitat; are white foxes or grey foxes more likely to survive and why?
White foxes are more likely to survive becase their white coats help them blend into the snow
What is the process by which new species form from existing species?
Speciation
What might cause an organism to become extinct?
An organism could go extinct because its traits are no longer suited to live in a specific environment. This can be caused when the environment changes.
Organisms with traits that _____ their chances of surviving and reproducing in their environment tend to leave more offspring
Increase
Separate species evolve similar traits.
What is the difference between natural selection and artificial selection?
Natural selection is not changed by humans, artificial selection is controlled by humans to have a specific outcome
What is genetic variation?
a variety of traits in a population of species.
True or false : populations evolve, not individuals.
True
Natural selection over many generations creates ______
Evolution
What is a species?
A species that lives and inbreeds and offspring can have offspring.
A population of rabbits come in brown and white fur. In their environment the weather changes and there is less snow. The land becomes more brown. A disease takes over the local hawk population. The hawks are the main predator of the rabbits. Predict what will happen to the rabbit population.
The population of rabbits will increase.