Natural and Artificial Selection Flashcards
(5 cards)
1
Q
What is Natural Selection?
A
When certain characteristics change over MANY generations, as organisms with heritable traits survive and reproduce.
2
Q
What stimulates natural selection?
A
Selective pressures.
3
Q
What is seletive pressure? Give an example from each of 2 categories of selective pressures. Describe breifly.
A
It’s when specific environmental conditions select for one traits over the other. There are biotic and abiotic factors.
Example of biotic: other animals learned how to eat more berries and now bears have none.
Example of abiotic: the drought came over a region where animals depend on rains.
4
Q
How is the ability to produce more viable offspring called?
A
Fitness.
5
Q
What are some examples of Artificial Selection?
A
Corn, wild mustard, cows, dogs.
