Biology- Photosynthesis and transpiration

Questions about photosynthesis and transpiration including adaptations of the leaf.

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What is the symbol equation for photosynthesis?
6CO2+6H20----->C6H1206+6O2. Chlorophyll and sunlight go above and below the arrow.
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Where does photosynthesis take place?
In the leaves of green plants (that contain chloroplasts).
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Which factors affect the rate of photosynthesis?
Light intensity, CO2 levels and the amount of water.
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Photosynthesis converts light energy into what type of energy?
Chemical energy.
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Why are leaves broad?
They have a large surface area exposed to the light to aid photosynthesis.
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Give the adaptation of the upper epidermis.
It is transparent to let light through to the palisade layer.
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In a leaf, most chloroplasts are situated where?
In the palisade layer near the top of the leaf.
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The waxy cuticle prevents water loss- true or false?
True.
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What do the xylem carry?
Water and mineral salts.
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What are the little holes in the bottom of the leaf called and what is their purpose?
They are called stomata and they open and close to allow carbon dioxide to diffuse directly into the leaf. They are controlled by guard cells.
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Phloem vessels carry water- true or false?
False, they carry sugars, sucrose and amino acids.
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How do root hair cells take in water?
Osmosis.
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What is transpiration?
The loss of water from a plant.
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What is the transpiration stream?
This is when the water loss from the leaf causes more water to be drawn up through the xylem vessels and creates a continuous stream of water.
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How does the light intensity affect transpiration?
More light=more transpiration.
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How does humidity affect transpiration?
Drier air= more transpiration. Humid air already contains a lot of water vapour and so the concentration gradient is not very big, meaning that the rate of diffusion and therefore transpiration are both very slow.
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If the wind speed is high, the rate of transpiration decreases- true or false?
False, it increases as the concentration gradient is bigger when water vapour outside of the leaf can be blown away.
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Which type of organisms need transport systems and why?
Multicellular ones as without them, transport is very slow and cells in the middle cannot diffuse substances quick enough.
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Other cards in this set

Card 2

Front

Where does photosynthesis take place?

Back

In the leaves of green plants (that contain chloroplasts).

Card 3

Front

Which factors affect the rate of photosynthesis?

Back

Preview of the front of card 3

Card 4

Front

Photosynthesis converts light energy into what type of energy?

Back

Preview of the front of card 4

Card 5

Front

Why are leaves broad?

Back

Preview of the front of card 5
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