Leaf Disk Lab /Stomata Lab Quiz

What is the main function of stomata in leaves?

• To allow gases to move rapidly in and out of leaves.

• To absorb sunlight for photosynthesis.

• To store water and nutrients.

• To provide structural support to the leaf.

If 18 leaf discs are floating after 12 minutes, what is the rate of discs per minute?

• 1.0 discs/minute

• 1.5 discs/minute

• 2.0 discs/minute

• 2.5 discs/minute

Explain the term 'stomatal opening'.

• The process by which stomata open to allow gas exchange.

• The process of photosynthesis in plants.

• The mechanism of water absorption in roots.

• The method of nutrient transport in leaves.

What is the relationship between stomata and transpiration?

• Stomata facilitate transpiration by allowing water vapor to exit the leaf.

• Stomata prevent transpiration by closing during the day.

• Stomata are responsible for photosynthesis, not transpiration.

• Stomata absorb water from the soil to aid in transpiration.

What factors can cause stomata to close?

• High humidity

• Low temperatures

• Low humidity, high temperatures, and darkness

• Bright light

What is transpiration?

• The process of photosynthesis in plants.

• The diffusion of water vapor out of a leaf.

• The absorption of nutrients by roots.

• The movement of water through soil.

What is the process by which plants convert carbon dioxide and water into glucose and oxygen using sunlight?

• Photosynthesis

• Respiration

• Transpiration

• Fermentation

Which arrow in a leaf diagram typically indicates the direction of carbon dioxide diffusion on a sunny day?

• Arrow A

• Arrow B

• Arrow C

• Arrow D

How does temperature affect the rate of photosynthesis?

• Higher temperatures always increase the rate of photosynthesis.

• Higher temperatures can increase the rate of photosynthesis up to a certain point, after which it may decrease.

• Temperature has no effect on the rate of photosynthesis.

• Lower temperatures increase the rate of photosynthesis.

What is the effect of light intensity on photosynthesis?

• Increased light intensity generally increases the rate of photosynthesis until saturation is reached.

• Light intensity has no effect on the rate of photosynthesis.

• Higher light intensity decreases the rate of photosynthesis due to overheating.

• Photosynthesis only occurs in the absence of light.