Equal numbers of light and dark moths were placed in two different environments. The table below shows how the population in each
environment changed after one generation of moths.
Starting population
Dark-colored
moths
moths
Ending population
Light-colored Dark-colored
moths
moths
Environment Light-colored
Light-colored
trees
30
30
40
20
Dark-colored
trees
30
30
20
40
Which statement about the moths do these data support?
A. The dark-colored moths chose to mutate to become adapted to
dark-colored trees.
B. The light-colored moths reproduced more often on the dark-
colored trees.
C. The dark-colored moths were more fit in an environment with light-
colored trees

How are the cell walls of a plant and fungus different ?

What is the difference between an igneous, sedimentary and metamorphic rock

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).