Structure of a leaf

Structure of a leaf

by LAKSHMI SURESH

​The internal structure of a leaf

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Multiple Choice

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

Multiple Choice

Most of the chloroplast cells are found in the

• upper epidermis

• pallisade mesophyll layer

• lower epidermis

• stomata

Multiple Choice

The water needed for photosynthesis comes into the leaves through the

• upper epidermis

• stomata

• guard cells

• xylem cells

Multiple Choice

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

• upper epidermis

• phloem

• stomata

• guard cells

Multiple Choice

The reactants needed for photosynthesis to occur are:

• carbon dioxide & water

• carbon dioxide & oxygen

• oxygen & water

• carbon dioxide, oxygen & water

Multiple Choice

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 

Multiple Choice

Plants need to take in oxygen gas for respiration

• only at night 

• only during the day

• both during the day & the night

Multiple Choice

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

Multiple Choice

Water & soluble nutrients move through the plant in 

• the phloem cells

• the xylem cells

• the root hair cells

• palisade mesophyll layer

Multiple Choice

Sugar and the products of photosynthesis move through the plant in 

• the phloem cells

• the xylem cells

• the root hair cells

• palisade mesophyll layer