Which of the following would be considered homologous structures? 1. all of these are homologous structures. 2. none of these 3. the arm of a koala and the tentacle of a nautilus 4. the flipper of a dolphin and the tentacle of a nautilus 5. the flipper of a dolphin and the arm of a koala

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

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.