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Leaf structure Contents
Photosynthesis
Limiting Factors
Uses of Glucose
Plants and Water
Osmosis
Osmosis in Different Cells
Transpiration
Plant Growth and Fertilisers
Plant Senses and their Commercial Uses
Response to Water
Response to Gravity
Response to Light
PLANT PROCESSES…read more

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The Leaf Structure…read more

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The Leaf…read more

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Leaves and Photosynthesis
A leaf has an upper and lower epidermis covered with a waxy cuticle
The spongy mesophyll and palisade cells contain chloroplasts
Guard cells surround the stomata
Leaves are adapted for efficient photosynthesis by having a large
surface area, being thin and having veins
Photosynthesis occurs mainly in the leaves
Water enters the root hairs by osmosis
Carbon dioxide enters and oxygen leaves by diffusion through stomata
The leaf is very efficient in photosynthesising because it has a large
internal surface area, internal air spaces and many chloroplasts in the
palisade layer
There are three main limiting factors that affect the rate of
photosynthesis. They are:
Light
Carbon dioxide
Temperature…read more

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