Which of the following is not one of the parts of a nucleotide? * pentose sugar
O phosphate group
fatty acid
nitrogen base

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

What causes temperature extremes in the desert

Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?