Factors affecting photosynthesis

What are the three main limiting factors affecting the rate of photosynthesis?

• Light intensity, carbon dioxide concentration, and temperature
• Carbon dioxide concentration, soil type, and temperature
• Light intensity, nitrogen concentration, and humidity
• Water, oxygen concentration, and temperature

What happens to photosynthesis when light intensity is increased?

• The rate of photosynthesis increases until it reaches a maximum point
• The rate of photosynthesis decreases
• Photosynthesis stops completely
• There is no effect on photosynthesis

Which type of plants are known to photosynthesize efficiently in dim light?

• Shade plants
• Desert plants
• Herbaceous plants
• Aquatic plants

What effect does temperature have on photosynthesis?

• Too high or too low temperatures can slow down the rate of photosynthesis
• Temperature has no effect
• Only low temperatures affect photosynthesis
• Only high temperatures affect photosynthesis

What role does chlorophyll concentration play in photosynthesis?

• It can affect the efficiency of photosynthesis
• It only affects the color of the plant
• It increases carbon dioxide absorption
• It has no effect on photosynthesis

How can farmers increase crop growth in greenhouses?

• By controlling light intensity, carbon dioxide concentration, and temperature
• By using more fertilizers only
• By limiting light exposure
• By reducing water supply

What is the effect of carbon dioxide concentration on photosynthesis?

• Insufficient carbon dioxide limits the maximum rate of photosynthesis
• It can increase plant height
• It has no effect on photosynthesis
• It enhances light absorption

What happens to enzymes involved in photosynthesis at temperatures above 40°C?

• They start to denature
• They increase in number
• They have no effect
• They become more active

What happens to the rate of photosynthesis in cold temperatures?

• The rate of reaction drops as enzymes move more slowly
• It increases significantly
• It remains unchanged
• Photosynthesis stops completely

How can waste carbon dioxide from factories benefit greenhouses?

• It can be used to promote plant growth
• It serves no purpose
• It harms the plants
• It reduces the amount of oxygen