Gel electrophoresis separates pieces of dna based on

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Which of these is not a nucleotide base found in dna?

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