For all cells where protein synthesis occurs, which base pair is found only in mRNA?
A. adenine : thymine
B. uracil : adenine
C. cytosine : uracil
D. cytosine : guanine

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z

Scientific evidence is most likely to be consistent if it is based on data from