3. which of the following statements regarding dna is false?
a. dna uses the nitrogenous base uracil.
b. dna is a nucleic acid.
c. one dna molecule can include four different nucleotides in its structure.
d. dna uses the nitrogenous base thymine.
e. dna molecules have a sugar-phosphate backbone.

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

What kinds of molecules can pass through the cell membrane without any problem?

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.