Photosynthesis and cellular respiration are important components of the carbon cycle, in which carbon is exchanged among the biosphere, atmosphere, oceans, and geosphere through chemical, physical, geological, and biological processes.
The answer could be either B or D. Both are important for marine biology. I would have to say D is the best answer though!
Mutations can occur before, during, and after mitosis and meiosis. If a mutation occurs in cells that will make gametes by meiosis or during meiosis itself, it can be passed on to offspring and contribute to genetic variability of the population
B, virtues.
A virtue is a trait or quality that is deemed to be morally good and is valued as a foundation of principle and good moral being. Personal virtues are characteristics valued as promoting collective and individual greatness.
Two identical DNA strands
