What statement could explain why viruses were not the first to evolve?

viruses are parasites
viruses have to infect a living cell in order to reproduce
viruses have no cell membrane
viruses contain either dna or rna

true                                                                                                       true true true true true true

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.