Identify the dependent variable in the experiments. Identify a control group missing from the second experiment. Justify the need for this control group in the second experiment.

hello there the answer is d

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

multiplying and dividing the two decimals and the eqations by the same number of the overalls

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.