Functions of Leaves in Plants

The video explains the structure of dicotyledonous plant leaves, highlighting their role in gas exchange and photosynthesis. It covers the protective epidermis and cuticle layers, the photosynthesis-rich palisade mesophyll, and the air space-filled spongy mesophyll. The function of stomata and guard cells in regulating gas exchange is discussed, along with the transport roles of xylem and phloem in the vascular bundles.

What is the primary function of leaves in terrestrial plants?

• To store water

• To absorb nutrients from the soil

• To provide structural support

• To conduct photosynthesis and gas exchange

What is the role of the cuticle on a leaf?

• To transport nutrients

• To facilitate gas exchange

• To reduce water loss

• To aid in photosynthesis

Where in the leaf does the majority of photosynthesis occur?

• In the spongy mesophyll

• In the guard cells

• In the palisade mesophyll

• In the cuticle

What is a characteristic feature of the spongy mesophyll?

• Thick cuticle layer

• High chloroplast density

• Numerous air spaces

• Tightly packed cells

What is the function of stomata in leaves?

• To transport water

• To store nutrients

• To facilitate gas exchange

• To protect the leaf surface

What do guard cells do?

• They store water

• They control the opening and closing of stomata

• They protect the leaf from pathogens

• They transport food

Which tissue in the vascular bundle is responsible for transporting water?

• Phloem

• Xylem

• Epidermis

• Cuticle

What is the main function of phloem in the leaf?

• To provide structural support

• To transport water

• To conduct photosynthesis

• To transport food

Which cells in the leaf contain chloroplasts and are involved in photosynthesis?

• Palisade mesophyll cells

• Guard cells

• Epidermal cells

• Cuticle cells