Bio Final

Question 1

Evolution

Answer 1

Is a change in genetic composition of a population over time

Question 2

what are the 3 levels of evolution

Answer 2

• molecular level ( genes are passed down)
  -population ( interbreeding )
• Individual level ( who survives and produces)

Question 3

How is animal diversity generated

Answer 3

-Gentic variation( mutation, immigratin and horizontal transfer

-Devleopmental process

Question 4

Why do changes in the genetic makeup of the population occur

Answer 4

• The addition of new genes ( mutation, immigration, and horizontal transfer)
• shifts in the frequency of genes within the population

Question 5

Gene frequency changes happen

Answer 5

• because of genetic drift( random process) and natural selection(nonrandom process.

Question 6

An example of genetic Drift

Answer 6

cats and aspirin
Ka/ks=1 in cats for the gene that protects them from animals

ka/ks<1 for the gene that is important for detoxifying compounds in animals it’s under selection

Question 7

What is important for promoting genetic drift

Answer 7

small population

Question 8

Evolution is driven by

Answer 8

-variation
- Natural selection
- Heritability

Question 9

what are the constraints of evolution

Answer 9

• chemical and physical constraints

Question 10

Evolution due to natural selction results in

Answer 10

adaptations ( traits that enhance the survival/ reproduction
of individuals