Most organisms in the biosphere exchange the gases oxygen and carbon dioxide with the atmosphere. Which of the following describe an exchange of matter between the atmosphere and the geosphere? A. a volcanic eruption releasing carbon dioxide into the atmosphere B. carbon dioxide dissolving from the atmosphere into ocean water C. the remains of living things settling on the floor of the ocean, and then becoming rock D. water vapor condensing in the air to form clouds

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.