Stomata are microscopic pores found on the underside of plant leaves. Each stoma is formed by guard cells, which can change shape in order to open or close the pore. When stomata are open, gases can be exchanged between the plant and the atmosphere, and water vapor can be released from the plant. A diagram compares an open stoma to a closed stoma. The closed stoma consists of two guard cells connected together while the open stoma shows the guard cells spread apart so there is an opening between them. This opening is labeled stoma. A diagram compares an open stoma to a closed stoma. The closed stoma consists of two guard cells connected together while the open stoma shows the guard cells spread apart so there is an opening between them. This opening is labeled stoma. Which of the following describes an investigation that could provide evidence that a feedback mechanism is involved in water homeostasis in plants? Choose 1 answer: Choose 1 answer: (Choice A) Plants of different species are collected from an area of forest, and the average number of stomata for each species is compared. A Plants of different species are collected from an area of forest, and the average number of stomata for each species is compared. (Choice B) Plants are placed in chambers that have different humidity levels, and their percentage of open stomata are quantified. B Plants are placed in chambers that have different humidity levels, and their percentage of open stomata are quantified. (Choice C) Plants are placed in a chamber where the concentrations of water vapor and carbon dioxide are kept constant, and the average stoma size is determined. C Plants are placed in a chamber where the concentrations of water vapor and carbon dioxide are kept constant, and the average stoma size is determined.