Amicrobiologist obtained two pure biological samples: one of a virus and the other of a viroid. unfortunately, the labels had been lost. the microbiologist felt she could distinguish the two by analyzing for the presence of a single molecule. what molecule would she search for and why?

The image shows a sandstone formation with visible bands of different colors. what do the bands indicate about how this sedimentary rock was formed? choose two answers. a). the rock was made from more than one material. b). water was absent during the compaction and cementation process. c). sediments and other matter were deposited in layers before lithification. d). the rock was stretched horizontally by the pressure from surrounding rocks. e). layers of hot liquid in the rocks cooled and solidified at different tempatures