Check my answers?

1. directional selection acts against:

a. both extremes simultaneously in the variation of the trait
b. one of the extremes in variation
c. the average or mean value for the population
d. none of these

2. punctuated equilibrium refers to:

a. slow, steady evolution of a small isolated population
b. rapid and continuous evolution of a population
c. rapid evolution of a population followed by periods of little change
d. none of these

3. the change of common color from light to dark in the peppered moth was an example of:

a. disruptive selection
b. directional selection
c. stabilizing selection
d. none of these

4. during the 1800s, seal hunters preferred dark-furred seals from natural seal populations. what effect would best describe what this did to the remainder seal populations over time?

a. stabilizing selection
b. creation of a genetic bottleneck
c. special creation
d. no effect at all

my answers:
1. c
2. c
3. b
4. b

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey

Wich level of organization includes all the other levels or organizations