What are two important differences in the structures of DNA and RNA? A. The sugar of RNA is ribose, rather than DNA's deoxyribose. The base uracil substitutes for DNA's thymine.
B. The sugar of RNA is deoxyribose, rather than DNA's ribose. The base thymine substitutes for DNA's uracil.
C. DNA always has a single strand, while RNA always has a double strand.
D. RNA always has a single strand, while RNA always has a double strand.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

State one important difference between a physical change and a chemical change?

Which of the following molecules is polar? c3h7oh c2h5cooh