Life Processes in Plants — Science STD 7 — Question

 (1) Large Surface Area:
→ Leaves are generally broad and flat.
→ This maximizes the surface area exposed to sunlight, allowing the leaf to capture as much light as possible for photosynthesis.
(2) Thinness:
→ Leaves are relatively thin.
→ This allows sunlight to penetrate through the layers of the leaf, ensuring that the light reaches the chloroplasts in the cells where photosynthesis occurs. It also reduces the distance that carbon dioxide has to diffuse to reach the photosynthetic cells.
(3) Stomata:
→ Leaves have tiny pores, usually on the underside, called stomata.
Stomata allow for gas exchange. Carbon dioxide enters the leaf for photosynthesis, and oxygen (a byproduct of photosynthesis) exits the leaf.
(4) Chloroplasts:
→ The cells within the leaf, particularly the mesophyll cells, are packed with chloroplasts.
→ Chloroplasts contain chlorophyll, the pigment that absorbs sunlight.
(5)Vascular Bundles (Xylem and Phloem):
→ Leaves have a network of veins containing xylem and phloem.
→ Xylem brings water to the leaf for photosynthesis, and phloem carries the sugars produced during photosynthesis to other parts of the plant.