Biology b4

• Name and identify the parts of the leaf 

5 ways leaves are adaped for efficant photosynthesis?

• Broad large surface area
• thin so short distance for gas to travel
• cotains chlorophyll to absorb light
• have a network of veins for support and transport
• stomata for gas exchange

Gas is exchanged by?

• Diffusion

How is the sturucture of the palisade cell related to its function?

• Contains many chloroplasts

How is the cellular structure of a leaf adapted for efficent photosynthesis?

• epidermis is transparant
• palisade layer at top conatining most of the chloroplasts
• air spaces in spongy mesophyll allow diffution between stomata and photosynthesising cells
• internal surface area / volume ratio very large

What are the steps that water tavels through a plant

1 absorbtion from the soil through root hairs

2 transport through plant to leaves

3 evaporation from the leaves

(transpiration)

transpiration privides the plant with water for?

• cooling
• photosynthesis
• support
• movement of minerals

how is the structure of a leaf adapted to reduce exessive water loss?

• waxy cuticle
• small number of stomata on upper surface

how is the cellular structure of a leaf adapted to reduce water loss?

• changes is guard cell turgidity (due to light intensity and availability of water) to change size of stomata
• number, distbution , position and size of stomata