Question

multiple-choice question
what are the factors that can affect the rate of photosynthesis in plants?
the amount of oxygen
the amount of light
amount of carbon dioxide
amount of water
temperature
the amount of nitrogen
the amount of phosphorus
rewatch

Explanation:

• Light: It is the energy source for photosynthesis. More light (to a certain point) can increase the rate.
• Carbon dioxide: It is a reactant in photosynthesis ($6CO_2 + 6H_2O

ightarrow C_6H_{12}O_6+6O_2$). More $CO_2$ (to a point) can speed up the process.

• Water: It is also a reactant. Lack of water can slow photosynthesis as it affects cell turgor and enzyme activity.
• Temperature: Enzymes involved in photosynthesis work best in an optimal temperature range. Too high or too low temperatures can decrease the rate.

Oxygen is a product of photosynthesis, not a factor affecting its rate. Nitrogen and phosphorus are important for plant growth (e.g., as parts of amino - acids and nucleic acids for nitrogen, and as part of ATP and nucleic acids for phosphorus), but they are not direct factors in the photosynthesis chemical reaction.

Answer:

B. the amount of light, C. amount of carbon dioxide, D. amount of water, E. temperature