natural selction Flashcards
What is natural selection?
Individuals better adapted to their environments is then able to survive and reproduce more often than less well adapted individuals.
What do you need for natural selection to occur?
Variation
Environmental pressure
Selection of certain inheritable traits
Adaptation over many generations
what is variation?
Individuals of the same species have different traits
What can increase variation?
Crossing over in meiosis
Sexual reproduction
Mutation
What is environmental pressures?
pressure from a organisms environment which spur change
What are the pressures that cause natural selection?
Climate
Predators
Lack of resources
what are Inheritable traits ?
The organisms with favorable traits survive and passed down their DNA to their offspring
It’s important to remember that evolution acts on phenotypes not genotypes.
what are adaptations?
Beneficial variation in a behavior or trait that an individual is born with.
Allows them to survive in their environment
