Which of the following is a cause of desertification?
A rivers flowing outward to the oceans
B basins being drained by river systems
C the soil becoming less fertile for farming
D too many people using the water supply

Which of the following is not a technology that can be used to conserve resources? a. hydropower b. volcanic power c. natural gas d. geothermal select the best answer from the choices provided a b c d

What happens when a scientific theory is shown to be an accurate description of a phenomenon?

Assume that you are interested in separating short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range. you have two recipes for making your polyacrylamide gels: one recipe uses 1.5 percent agarose and would be considered a “hard gel,” while the other uses 0.5 percent agarose and would be considered a loose gel. which gel should you use to separate the short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range?