Structure of a Leaf

The leaf is known as the ___________.

• photogenic organ

• Photosynthetic organ

• Photographic organ

thin stalk that connects the blade of the leaf to the plant's stem

• blade

• cuticle

• petiole

• epidermis

a thin, flat part of the leaf that extends off the end of the petiole

• blade

• cuticle

• petiole

• epidermis

There are ____ types of vascular tissue.

• 4

• 5

• 2

• 3

The vascular tissues are ____&____.

• ­Xylem and Phlobotemy

• ­Xylemy and Phloemy

• ­Xylemotomy and Phloemotomy

• ­Xylem and Phloem.

The water needed for photosynthesis comes into the leaves through the

• upper epidermis
• stomata
• guard cells
• xylem cells

The important gases, carbon dioxide and oxygen, enter and leave the leaf through the

• upper epidermis
• phloem
• stomata
• guard cells

Which structures open and close stomata to allow gas exchange but prevent water loss in leaves?

• Epidermis
• Vascular tissue
• Guard cells
• Spongy mesophyll

Which structure helps prevent water loss and protects the leaf?

• Palisades mesophyll
• Spongy mesophyll
• Vascular tissue
• Cuticle

The vascular tissue which transports sugar (food) in both directions within the leaf is the

• xylem

• phloem

• bundle sheath

• chloroplast