Leaf Structure - Review

The leaf blade has a large flat surface compared to its volume to

• obtain maximum sunlight for photosynthesis

• obtain maximum water for photosynthesis

• obtain maximum oxygen for photosynthesis

• obtain maximum glucose for photosynthesis

What is the function of the leaf stalk (also known as petiole)?

• holds the leaf blade away from stem so the leaf blade cannot obtain sunlight

• it has no function in a plant

• holds the leaf blade away from stem so the leaf blade obtains sunlight

• holds the leaf blade very close to the stem so the leaf blade obtain sunlights

The waxy and transparent layer in the upper epidermis of a leaf blade is called ___________ which reduces _________ loss through epidermal cells.

• cuticle, mineral

• stomata, water

• stomata, mineral

• cuticle, water

The main site of photosynthesis happens in which of the following?

• upper epidermis

• mesophyll

• lower epidermis

• stomata

Which of the following statements is true?

• photosynthesis happens only in the palisade mesophyll cells and not in the spongy mesophyll cells

• photosynthesis happens only in the spongy mesophyll cells and not in the palisade mesophyll cells

• the rate of photosynthesis is the same in the palisade mesophyll cells and spongy mesophyll cells

• the rate of photosynthesis is greater in the palisade mesophyll cells than the spongy mesophyll cells

Xylem transports ________ while phloem transports ________

• water & mineral ions, sugars

• sugars, water & mineral ions

• sugars, sugars

• water, carbon dioxide