Which scenario would most likely not lead to speciation?

a) a flood washes a few lizards or insects to a new island.

b) neighboring herds of elk misinterpret each other’s mating behaviors, causing them to fight instead of mate.

c) varieties of flowering plants produce pollen in different seasons causing them to be unable to pollinate one another.

d) the rock pocket mice with the dark fur gene mutation survive best on the dark lava flows because they are camouflaged from predators, unlike their lighter counterparts.

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

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).

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b.a light particle