Which of these zones of the ocean is deepest? A. Abyssopelagic
B. Epipelagic
C. Hadalpelagic
D. Bathypelagic

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.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above