Which of these questions can be answered through science

Which one of these is a involving in both sexual and asexual reproduction

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer