How many times greater is the concentration of DDT at the highest trophic level than at the lowest trophic level?

Biomagnification (or bioaccumulation, or biological amplification) is the increase in the

concentration of persistent chemicals (such as pesticides) in ecosystems as they pass

up the levels of a food chain or food web.

100 000X more concentrated

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a

cell regulation is conducted by special proteins.