In addition to lactose, other sugars show little or no utilization in the presence of glucose. The utilization of many of these sugars (xylitol, arabinose, sorbitol, etc) requires proteins whose genes are found in operons. What feature would all of these operons share if they are being regulated by glucose levels

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.