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Plant Respiration and Photosynthesis

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Questions and Answers

During daylight, plants photosynthesize at a faster rate than they respire because:

The upper epidermis allows more light to reach the palisade mesophyll cells
There is a higher intake of carbon dioxide and release of oxygen (correct)
The spongy mesophyll cells contain chloroplasts for photosynthesis
The structure of the leaf allows for more absorption of light

What are the limiting factors of photosynthesis?

Water intake, oxygen release, carbon dioxide production
Nitrogen concentration, humidity, wind speed
Carbon dioxide concentration, light intensity, temperature (correct)
Soil pH, precipitation, cloud cover

Why is the large surface area of a leaf important?

To allow more diffusion of carbon dioxide (correct)
To store excess water
To block sunlight from reaching the chloroplasts
To increase the size of the leaf

What is the function of the waxy cuticle on the leaf's surface?

It protects against water loss without blocking sunlight (A) Signup and view all the answers

Which part of the leaf contains chloroplasts that absorb light energy for photosynthesis?

Palisade mesophyll cells (C) Signup and view all the answers

Why do spongy mesophyll cells have air spaces?

To allow carbon dioxide to diffuse easily through the leaf (C) Signup and view all the answers

What is the purpose of the waxy cuticle found on the surface of a leaf?

To protect against water loss without blocking sunlight (D) Signup and view all the answers

Why are palisade mesophyll cells located at the top of the leaf?

To absorb more light for photosynthesis (C) Signup and view all the answers

What role do spongy mesophyll cells play in leaf structure?

Facilitate the easy diffusion of carbon dioxide through the leaf (B) Signup and view all the answers

How does the large surface area of a leaf contribute to photosynthesis?

It enhances the diffusion of carbon dioxide and absorption of light (C) Signup and view all the answers

What is the primary function of chloroplasts in palisade mesophyll cells?

Absorb light energy required for photosynthesis (A) Signup and view all the answers

How does the presence of air spaces in spongy mesophyll cells benefit leaf function?

Allows for easy diffusion of carbon dioxide through the leaf (A) Signup and view all the answers

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