Question

use the photosynthesis interactive to answer the question. suppose that you conduct an experiment to determine how photosynthetic output, measured in oxygen (o₂) production, changes as you alter photosynthesis, and generate the graph. identify which manipulations to photosynthesis generated the observed changes in o₂ production depicted in the graph.

Explanation:

Step1: Recall photosynthesis factors

Photosynthesis is affected by factors like CO₂, O₂, temperature and light. CO₂ is a reactant, O₂ can inhibit, high - temp can denature enzymes and light is an energy source.

Step2: Analyze high CO₂

High CO₂ increases the amount of reactant available for the Calvin - cycle in photosynthesis, leading to an increase in O₂ production as a by - product of the light - dependent reactions.

Step3: Analyze high O₂

High O₂ can lead to photorespiration in plants, which competes with photosynthesis and reduces the efficiency of carbon fixation and thus decreases O₂ production.

Step4: Analyze high temperature

High temperatures can denature enzymes involved in photosynthesis. Enzymes like Rubisco are crucial for the Calvin - cycle. When denatured, the rate of photosynthesis decreases, reducing O₂ production.

Step5: Analyze low light

Low light intensity limits the energy available for the light - dependent reactions of photosynthesis. Since the light - dependent reactions produce ATP and NADPH required for the Calvin - cycle, less light means less O₂ production.

Answer:

High CO₂ increases O₂ production; high O₂ decreases O₂ production; high temperature decreases O₂ production; low light decreases O₂ production.