Tuesday, March 27, 2012

Evolution Study Guide Answers

C - Level

1. adaptations, environment
2. genetic change in a population over time
3. peppered moths - as the trees turned colors due to pollution, the dark moths increased in number because they had adaptations that were better suited for the environment.
4. variation
5. DNA

B - Level
1. fitness
2. adaptations are passed on, they will be more frequent in the population; camel's fat helps it survive for a long time without food. camels with less fat will have lower fitness, camels with more fat will have higher fitness = they will survive and pass on their genes
3. geographic isolation, behavioral isolation, temporal isolation
4. ability to stay cool, nocturnal (sleep at night), manage water loss
5. population A - the chance of an animal having an adaptation that is beneficial is higher

A - Level
1. Sexual reproducers create variation; Sexual minnows got sick less, peacocks had healthier offspring
2. baby birth weight - not good to be too small, not good to be too large, middle is the best
3. it's extremely rare for all conditions to be met - therefore, evolution must happen.