we do not need to study
Without yeast, dough would not rise or bake properly.
Sea level will rise
Your buttcrack would definitely show. I suggest you wear low rise undewear or super low rise underwear depening on the jeans.
carbon dioxide could be absorbed
the cell would die and not be used and rise up in to your skin.
It would rise to the sky slower than a sunny day
Hitler would rise from the grave and campaign for election on a defeating unemployment ballot.
demand will rise
It would rise very high.
they would rise to power and enslave humanity
It's Pressure would rise.
Your cake would not rise. Or your cookies would not spread. Probably a Denser cake, or tougher cookie would be the case in those two instances..