Botany

The leaf has a shiny, waxy cuticle around it 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 water needed for photosynthesis comes into the leaves through the

• upper epidermis
• stomata
• guard cells
• xylem cells

Tags

NGSS.MS-LS1-6

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

Plants need to take in oxygen gas for respiration

• only at night 
• only during the day
• both during the day & the night

Transpiration helps the plant

• make more sugars at night
• move water from the roots to the stem and leaves
• move sugars from the leaf to be stored in the stem & roots
• make more chloroplasts

Water & soluble nutrients move through the plant in 

• the phloem cells
• the xylem cells
• the root hair cells
• palisade mesophyll layer

Sugar and the products of photosynthesis move through the plant in 

• the phloem cells
• the xylem cells
• the root hair cells
• palisade mesophyll layer

What is the name of the clear layer of cells (H) on top of the leaf?

• Cuticle

• Air space

• Guard cell

• Upper epidermis

Tags

NGSS.MS-LS1-2