Which of the following is not true about uracil as an incorrect base in dna?
a., it arises from a modified form of cytosine.
b., it occurs frequently across the genome.
c., it improperly pairs with guanine on the opposite strand.
d., it converts the dna strand into rna.

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above