Which is the correct explanation for 120°w longitude?
a. all positions along a circle that runs perpendicular to the equator and 120° west of the prime meridian
b. all positions along a circle that runs perpendicular to the equator and 120° east of the prime meridian
c. all positions along a circle that runs parallel to the prime meridian and 120° east of the equator
d. all positions along a circle that runs perpendicular to the prime meridian and 120° west of the equator

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.

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?

What type of bonds link individual amino acids together?