Scientists are studying compounds in a newly discovered rain forest plant. The plant produces an unusual substance that local people say acts as an anesthetic. One scientist tested the substance with the chemical indicator copper (II) sulfate and sodium hydroxide. if the test is negative, which type of macromolecule is not present in the substance?

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.