? Question Select all the correct answers.
Suppose a team of astronomers recently discovered a solar system similar to our own, but in
an earlier stage of development. Based on how the planets of our solar system formed, which
two observations would you expect the astronomers to make?
Hole
dense, rocky objects orbiting near the central star
thick clouds of liquid helium orbiting near the central star
planetesimals orbiting in different directions around the central star
clusters of rock loosely held together by gravity
the rate of rotation slowing down for all objects
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Which of these resources is used worldwide to make construction products, pottery, and porcelain

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

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).