Energy is one of the underlying themes of science. which of these best represents how the concept of energy will shape our future? a) the amount of total energy will continue to decrease b) plants will stop doing photosynthesis to create energy c) the amount of energy available in food chains will increase dramatically d) we must find alternative sources of energy besides nonrenewable fossil fuels

Ashort, vertical, solid, or fleshy stem possessed by gladiolus and which is used in reproduction is termed a

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 the ecological role of food chains and food webs