A biologist discovers a new species of plant that grows in very wet climates. She studies the plants stoma, the pores in the lead of a plant that allow for gas exchange, and hypothesizes that this species would not be able to regulate the size of its stoma when there are changes in water availability. Which experiment can she perform to best test this hypothesis? Choose the correct answer. Group of answer choices She trims a different amount of roots from each plant and measures the amount of glucose produced by each plant. She places leaves from the plant in solutions containing different amounts of salt and measures the time it takes the leaves to dry out. She waters different plants with different volumes of water and measures the diameter of stoma in each leaf. She grows the plant in greenhouses with various levels of humidity and measures the amount of oxygen produced by each plant.

She waters different plants with different volumes of water and measures the diameter of stoma in each leaf.

Explanation:

Every problem in Science is solved through procedure known as Scientific method. It is step wise procedure

Presence of Problem: Here in this case problem is related to regulation of stoma

Observation: She observed through her senses that stomata of this plant does not regulate (increase or decrease) the size.

Hypothesis: Hypothesis is the assume statement the validity of which is unknown. In this case she assumed that this new discovered specie does not have the ability to increase or decrease the size of its stoma during variable water conditions.

Deduction: Deduction is defined as the logical consequence of the statement. In this case logical consequence must be that all population member of this newly discovered specie must show the same behavior during variable water conditions.

Experiment: To test her hypothesis she perform an experiment and here in this case her best experiment would be that she waters different plants with different volumes of water and measures the diameter of stoma in each leaf. Leaf stoma opening and closing is directly link with the availability of water. If water concentration is limited than plant limits there stoma to reduce water loss. Similarly if water concentration is adequate in soil than plant open there stoma to maximum to release excessive water through it.

Results: If Plant stoma after exposing to different water conditions does not change their diameter than the said hypothesis is considered be true.

Theory: Tested true hypothesis become theory