Glucose travels by facilitated diffusion instead of simple diffusion like other molecules. why? a. the cell requires more glucose than the process of simple diffusion can supply
b. the glucose molecule is too large to travel by simple diffusion
c. glucose moves by simple diffusion into a cell

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