What is a disadvantage of using gas chromatographya)it is expensive to perform. b)it takes a day or more to obtain results. c)it requires a large quantity of the substance. d)it doesn't provide the exact chemical composition.

Any sound above what db can cause hearing loss in human beings

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the

Agenetically engineered corn plant is approved for agricultural use. the plant produces pollen that can make its own toxins. these toxins protect the corn plant against pests and no longer require the application of chemical pesticide. what is a likely impact on the farmer of growing such a variety of corn? a- the financial costs for the farmer would be lowered since less crops would be lost to pests. b-the financial costs for the farmer would be lowered since more crops would be lost to pests. c-the farmer may be held responsible for increasing chemical pollution. d-the farmer's expenses for pest control would increase due to an increase in bee population.