Which of these statements is true about the theory of plate tectonics and the theory of continental drift? a. the theory of plate tectonics does not explains how continental movement could occur b. theory of plate tectonics shows that continental movements could not have happened c. the theory of plate tectonics told exactly what the continents were before pangea divided d. plate of tectonics shows that pangea was impossible but the continents did move

Talking listening and reacting non verbally are all part of communicating

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

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?