Nitrogen bases pair with bases that are... available

complementary

complementary and identical

identical​

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis