In DNA and RNA, a nitrogen base, sugar, and phosphate groups together are called a

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

Suppose you are provided with an actively dividing culture of e. coli bacteria to which radioactive thymine has been added. what would happen if a cell replicates once in the presence of this radioactive base?