Need quick on bio final lt: describe how natural selection causes organisms on earth to change over time. lt: describe how factors like genetic drift and sexual selection can affect how populations evolve. the graph below shows frequency of moths in a population. the original population had more black and white speckled moths, but the new population has more dark colored moths. image result for directional selection a. what type of selective pressure was taking place in this population? b. come up with a hypothesis related to genetic drift or sexual selection about why this shift may have occurred in the population.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

bc blah

explanation:

bc blah

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands