The true statement concerning complex multi-cellular organism is Bulk transport systems move substances faster than simple diffusion.
Bulk transport is the mechanism that is used by the cells to transport the large quantity of small and tiny molecules and particles. Bulk transport works on the mechanism of pressure gradient and single diffusion is based on the concentration gradient.
The transportation on single diffusion is due to random motion of molecules but in bulk transport the solute and water is moved together and in a faster pace.
significant amounts of nitrogen oxides, carbon monoxide, and other pollution
passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.
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