Membrane biogenesis is the process which involves the synthesis of cell membrane with the help of proteins and lipids.
Bright colors such as flowers or light green bushes/trees would result in an decrease in a blackbirds population because the blackbird wouldn't be able to blend into its environment due to the dark color it has, allowing many predators to spot it. So brighter colored environments would result in the decrease of the blackbird population.
Parkinson's Disease which causes your muscles to not be able to relax and causes tremors.