Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
What do chimps and humans share |
a most recent common ancestor |
|
|
What is natural selection and who proposed it? |
Darwin mechanism that causes species to changd |
|
|
What are the three steps in natural selection |
overproduction of offspring competition for limited resources survival and reproduction or DEATH SURVIVAL OF THE FITTEST |
|
|
If an animal is more fit than another animal what does that mean |
it is better adapted to the env. and more likely to be able to successfully reproduce |
|
|
What usually drives evolution |
changes in the environment |
|
|
What must exist before changes in the env. cause evolution |
variation between species |
|
|
Why does variation occur |
sexual reproduction and mutation |
|
|
Are species with more variation more likely to survive env. changes? |
YES more variation allows for better chance they can adapt to the env. change |
|
|
What is gradualism theory |
change occurs slowly |
|
|
What is punctuated equilibrium |
theory that says evolution occurs in quick spurts |
|
|
What is geographic isolation and how does it cause reproductive isolation |
Animals evolve spearately and variation results that causes changes in reproduction preventing species from being able to reproduce results in speciation |
|
|
Where does evidence for evolution come from? |
biochemitry geology genetics anatomy embryology |
