Abiology class is studying the effect of temperature on the amount of growth of duckweed in an aquarium. what type of data will they need to collect, and which among the tools that they should use when gcollecting the data? a. they will gather qualitative data, using a thermometer and a hand lens. b. they will gather qualitative data, using a meterstick and a graduated cylinder. c. they will gather quantitative data, using a thermometer and a balance. d. they will gather quantitative data, using a beaker and a timer.

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).

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca

Which body region are part of the cephalic region?