students must design a device that uses 25 grams of reactant 1 and produces the maximum amount of heat with the smallest amount of reactant 2. How much of reactant 2 should they use to meet the criteria of the sesign challenge?

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.

Which characteristics must an object possess in order to be considered alive?

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.