Natural Selection
What is natural selection?
Species that are best adapted to their environment are able to reproduce
survival of the _____
Fittest
What causes evolution?
Natural selection over generations
True or false: evolution happens quickly and can change in one generation
False
What does common descent suggest?
All species, living and extinct, are related
What is an adaptation?
Any inherited characteristic that increases an organisms chance of survival
True or false: all living things on earth, alive and extinct, came from the first species to walk the earth
True
What did Charles Darwin discover?
Natural selection via different characteristics in tortoises
what is evolution?
When a population changes over time to better suit their environment
Are mutations random?
Yes
Which animal are humans most related to?
Chimpanzees
Humans participating in selection through selective breeding of plants and animals.
Is evolution and survival of the fittest the same thing?
No
Do fossils provide evidence of evolution? If so, how?
Yes, fossils provide evidence of evolution because they can 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
In the 1900s, when there was soot intoxicating the air, what color were the moths because of natural selection?
Black
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
Is the case stood of the peppered moth an example or artificial or natural selection and why?
Natural selection, because the rise in population with the specific moths grew with the changing environmental factor
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
In an environment with food that grows on trees; are animals with long legs more likely to survive than animals with short legs and why?
Yes, animals with long legs, necks or any phenotype that makes them taller will be more likely to survive because they have easier access to food.
True or false : populations evolve, not individuals.
True
Natural selection over many generations creates ______
Evolution
What is a population?
A species that lives and inbreeds within a specific area
What is genetic variation?
a variety of traits in a population of species.