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Questions and Answers
What is the primary function of leaves in plants?
What is the primary function of leaves in plants?
- Nutrient absorption
- Root growth
- Water storage
- Photosynthesis (correct)
Stomata are located on the upper epidermis of the leaf.
Stomata are located on the upper epidermis of the leaf.
False (B)
What role do guard cells play in leaf function?
What role do guard cells play in leaf function?
They control the opening and closing of stomata.
The ___ mesophyll layer contains chloroplasts, which are crucial for photosynthesis.
The ___ mesophyll layer contains chloroplasts, which are crucial for photosynthesis.
Match the following plant tissues to their functions:
Match the following plant tissues to their functions:
Flashcards
Photosynthesis
Photosynthesis
The process by which leaves convert carbon dioxide and water into sugar using sunlight.
Stomata
Stomata
Small openings on the leaf that allow gas exchange, primarily for the diffusion of carbon dioxide.
Waxy cuticle
Waxy cuticle
A protective layer on leaves that prevents water loss.
Guard cells
Guard cells
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Meristem tissues
Meristem tissues
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Study Notes
Leaf Structure and Function
- Leaves are the site of photosynthesis, a process requiring carbon dioxide and water.
- Water is transported to leaves by roots and the xylem.
- Carbon dioxide diffuses into the leaf through stomata, small holes in the lower epidermis that enable gas exchange.
- Carbon dioxide diffuses through spongy mesophyll tissue.
- Palisade mesophyll cells contain chloroplasts, the sites of photosynthesis.
- The upper epidermis is transparent to allow sunlight to reach chloroplasts.
- Sugar produced during photosynthesis is transported to other parts of the plant via the phloem.
Leaf Adaptations to Prevent Water Loss
- Leaves have a waxy cuticle on the upper surface to prevent water loss.
- Stomata close to reduce water loss.
- Guard cells regulate stomata opening and closing based on water availability.
- Turgid guard cells cause stomata to widen for increased gas exchange.
- Flaccid guard cells close stomata to conserve water.
- Guard cells respond to light, closing at night to conserve water.
- Stomata are primarily located on the lower leaf surface, which is cooler and reduces evaporation.
Other Important Plant Tissues
- Meristem tissues are plant stem cells.
- Meristem tissues are found at the growing tips of roots and shoots.
- Meristem tissues differentiate into various cell types, enabling plant growth.
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