Explain why the marine ecosystem generates a significant fraction of the oxygen in the atmosphere. A) The marine ecosystem generates 32% of the world’s primary producers. B) The organisms in the marine ecosystem converts carbon dioxide to oxygen faster than organisms in other ecosystems. C) Sunlight can easily penetrate the marine ecosystem. D) Evaporation is higher in the marine ecosystem than any other ecosystem.  

The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

Which soil would most likely be found in the arctic? andisols gelisols histosols spodosols