Question

1. describe the flow of energy through photosynthesis and cellular respiration.
2. use our model to provide evidence for what happens to the inputs of the system when light energy is absorbed.
3. some plants have the ability to be planted in soil. write a hypothesis for an experiment where you are changing whether or not the plant is in soil will change the mass of the plant.
4. describe how light energy is needed in order for the reaction to occur.
5. based on the information in table 1, explain how the plant can use photosynthesis to increase its mass?

for the exceed:

1. mom accidentally moved the plant into the closet for five days. why is it still alive after five days even without sunlight? be sure to explain your answer using the information in the table below.

initial mass (before 5 days in closet)\tfinal mass (after 5 days)
60.2 g\t57.7 g

Explanation:

1. In photosynthesis, light energy is absorbed by chlorophyll and used to convert carbon - dioxide and water into glucose and oxygen, storing energy in glucose. In cellular respiration, glucose is broken down to release energy in the form of ATP.
2. When light energy is absorbed, the input of the photosynthesis system (carbon - dioxide and water) is used to produce outputs (glucose and oxygen).
3. Hypothesis: If a plant is planted in soil, its mass will change compared to when it is not in soil, due to the availability of nutrients and water in the soil.
4. Light energy excites electrons in chlorophyll, which initiates a series of reactions that lead to the production of ATP and NADPH, which are required for the Calvin cycle to fix carbon - dioxide and form glucose.
5. Plants use light energy to convert carbon - dioxide from the air and water from the soil into glucose through photosynthesis. Glucose can be used to build plant tissues, increasing the plant's mass.
6. The plant is still alive after five days without sunlight because it can use stored glucose (produced during previous photosynthesis) for cellular respiration to release energy for basic life - sustaining processes. Although it lost mass (from 60.2 g to 57.7 g) likely due to respiration consuming stored glucose and water loss.

Answer:

1. In photosynthesis, light energy is captured and used to convert carbon - dioxide and water into glucose and oxygen, storing energy. In cellular respiration, glucose is broken down to release energy.
2. Absorption of light energy drives the conversion of inputs (CO₂ and H₂O) to outputs (glucose and O₂).
3. If a plant is in soil, its mass will change compared to when not in soil.
4. Light energy excites electrons, starting reactions to produce ATP and NADPH for the Calvin cycle.
5. Light - driven photosynthesis converts CO₂ and H₂O to glucose, which is used to build plant mass.
6. It uses stored glucose for respiration; mass loss is due to glucose consumption and water loss.