The model above shows the metabolic processes occurring in green plants. Plants use sunlight, plus carbon dioxide and water to produce glucose. The by-product of photosynthesis is oxygen, which is added to our atmosphere. Plants also respire; creating ATP, the energy they need to continue to grow, develop and reproduce. Imagine it is summer; there is a drought. How will the summer drought influence the model we see here?
Responses
A In a response to the drought, stomata will open more frequently. There will be higher outputs of CO2 and O2 as a result.In a response to the drought, stomata will open more frequently. There will be higher outputs of CO 2 and O 2 as a result.
B An increase in temperature will cause an increase in chemical activity. There will be increases in all chemical inputs and outputs in the model.An increase in temperature will cause an increase in chemical activity. There will be increases in all chemical inputs and outputs in the model.
C Water will be a limiting reactant in the model. As a result, less glucose will be produced. There will be less CO2 in and O2 and H2O out.Water will be a limiting reactant in the model. As a result, less glucose will be produced. There will be less CO 2 in and O 2 and H 2 O out.
D Water will be a limiting reactant in the model. There will be less H2O in through the roots and less H2O out via transpiration. The other inputs and outputs will remain constant.
C Water will be a limiting reactant in the model. As a result, less glucose will be produced. There will be less CO2 in and O2 and H2O out.
The correct answer is C - Water will be a limiting reactant in the model. As a result, less glucose will be produced. There will be less CO2 in and O2 and H2O out.
During a summer drought, there is a reduced availability of water for plants. As a result, the plants will experience water stress, which will impact their metabolic processes.
Water is essential for photosynthesis, as it is one of the reactants along with carbon dioxide and sunlight. In the absence of sufficient water, plants will not be able to efficiently carry out photosynthesis. This will lead to a decrease in the production of glucose, which is the primary energy source for plants.
Additionally, water is also involved in the process of respiration. Without enough water, plants will have reduced energy available for growth, development, and reproduction. This means there will be a decrease in the production of ATP, the energy molecule needed for these processes.
Moreover, transpiration, the loss of water vapor from the leaves, plays a role in the exchange of gases. With a limited water supply, plants will conserve water by closing their stomata, which are tiny openings on the leaves. This will result in decreased intake of carbon dioxide and reduced release of oxygen into the atmosphere. Therefore, there will be less CO2 in and O2 out in the model.
In conclusion, during a summer drought, the limited availability of water will have a significant impact on the metabolic processes of plants, leading to a decrease in glucose production and reduced gas exchange.