Plant Leaf Concepts

The leaf has a shiny, waxy cuticle on its surface to.....

• increase the rate of photosynthesis

• attract more light

• control water loss

• stop carbon dioxide and oxygen gases escaping

Most of the chloroplast cells are found in the

• upper epidermis

• palisade layer

• lower epidermis

• stomata

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

• upper epidermis
• phloem
• stomata
• guard cells

The role of the guard cell is to

• help control the temperature of the plant
• control how much water enters the leaf
• control how much glucose is stored
• control the movement of water vapour & gases 

Tags

NGSS.MS-LS2-3

Transpiration helps the plant

• make more sugars at night

• move water from the roots

• release water through the stomata

• make more chloroplasts

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

• Epidermis
• Vascular tissue
• Guard cells
• Spongy mesophyll

The cell organelle where photosynthesis occurs in plant cells is the

• chloroplast

• mitochondrion

• vacuole

• nucleus

The majority of the stomata of a leaf can usually be found within the

• guard cells

• upper epidermis

• lower epidermis

• cuticle

Where are most of the stomata found on a plant?

• Stem

• Root

• bottom of the leaf

• top of the leaf

What time of the day are stoma typically open?

• nighttime

• daytime