Which statement most accurately describes rough er? a. cytoskeletal filament found in cilia and flagella b. stack of flattened sacs that modify and sort proteins c. series of membrane-enclosed sacs with ribosomes on the surface d. series of membrane-enclosed sacs that detoxify substances and synthesize lipids

Peat deposits are found in waterlogged places where dead plant material piles up. when peat is buried, it undergoes compaction. it is subjected to heat and pressure for a long time, and a lot of water is squeezed out during this process. nearly ten vertical feet of original peat material becomes one vertical foot of coal. which of these remains unchanged in the system during the conversion of peat to coal? a) area b) density c) mass d) volume