Unit 2

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What are organs in a plant made of?
Tissues.
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What is an epidermis?
A protective layer that covers underlying cells, prevents pathogens from entering the plant and stops the leaves loosing too much water.
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Where does photosynthesis in a plant take place?
Mesophyll.
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What are the xylem and pholem?
Tubes that run through the plant. Make up the transport system.
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What does the xylem do?
Carries water from the roots to the leaves.
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What does the pholem do?
Transports sugars around the plant.
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What is the word equation for photosynthesis?
Carbon Dioxide + water --------> glucose + oxygen.
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What is the symbol equation for photosynthesis?
C02+H20 -------> C6H12O6+O2
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In photosynthesis, where is light energy stored?
In glucose molecules.
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How is energy transferred to animals?
When they eat the plants.
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What can glucose do in photosynthesis?
Glucose can be converted into starch and stored for later use.
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What CANT starch molecules do?
Cannot diffuse out of cells. They are too large.
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What is white light?
A continuous spectrum of colours from red to violet.
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How is light energy absorbed?
By chlorophyll. Found in the chloroplasts of plant cells.
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Why does chlorophyll look green?
It absorbs the red and blue parts of the spectrum and reflects green.
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What are limiting factors of photosynthesis?
Light, carbon dioxide concentration and temperature.
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How do plants convert glucose to proteins?
They use nitrogen found in mineral ions.
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Other cards in this set

Card 2

Front

What is an epidermis?

Back

A protective layer that covers underlying cells, prevents pathogens from entering the plant and stops the leaves loosing too much water.

Card 3

Front

Where does photosynthesis in a plant take place?

Back

Preview of the front of card 3

Card 4

Front

What are the xylem and pholem?

Back

Preview of the front of card 4

Card 5

Front

What does the xylem do?

Back

Preview of the front of card 5
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