Leaf structure

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

What is letter "A" pointing to?

• cuticle

• upper epidermis

• lower epidermis

• palisade mesophyll

Which structure helps prevent water loss and protects the leaf?

• Palisades mesophyll
• Spongy mesophyll
• Vascular tissue
• Cuticle

Letter "D" pointing to _______ mesophyll

Which of the following is pointing to the "guard cell"?

• B

• C

• D

• E

Most of the chloroplast cells are found in the

• upper epidermis
• pallisade mesophyll layer
• lower epidermis
• stomata

What is photosynthesis?

• Water loss by a plant.
• When a photographer takes a photo.
• To get your pictures from the photo lab.
• The process in which plants make their food.

carries water and minerals from roots to other parts of the plant via the

Which organelle from the plant cell is primarily responsible for converting sunlight to energy?

• Mitochondria
• Nucleus
• Vacuole
• Chloroplast