Which lists important roles of coral reefs? cleaning oil from oceans, protecting beaches, producing oxygen producing oxygen, offering medical benefits to humans, supporting a variety of organisms supporting a variety of organisms, cleaning oil from oceans, producing oxygen offering medical benefits to humans, protecting beaches, supporting a variety of organisms

the backbone of the dna and rna compound is sugar phosphate.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.