Hydrophytes

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What are hydrophytes?
Plants that live in a very wet habitat or that are submerged on the surface of water
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What is waterlogging?
where the air spaces in a hydrophyte gets logged with water and so the plant cant survive because has limited oxygen
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How has the stomata adapted to the wet environment?
They are always open, so the guard cells are inactive, which means that water can be lost freely, also it maximises gaseous exchange
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How have the cuticles adapted?
They are very thin or in some plants they dont even have them because they dont need to conserve water
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Why do some hydrophytes ahve a reduced structure?
Because they dont need as much support because the water is providing them with support
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Why do some hydrophytes, like water lilies, have wide flat leaves?
To increase the amount of light captured for photosynthesis
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How ave the roots adapted?
They are very short because they dont need to gather up water from soil because water can diffuse straight into the stem and leaves if a plant is submerged
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How do air sacs help the hydrophytes?
They help them float so that they have less chance being waterlogged
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What is aerenchyma?
It is a specialised form of parenchyma (packing tissue). It has huge air spaces in the due to apoptsis (programmed cell death)
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How does aerenchyma help hydrophytes?
It helps them float and also creates a low resistance internal pathway for transporting oxygen and to help it cope with extremely low oxygen conditions
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Other cards in this set

Card 2

Front

What is waterlogging?

Back

where the air spaces in a hydrophyte gets logged with water and so the plant cant survive because has limited oxygen

Card 3

Front

How has the stomata adapted to the wet environment?

Back

Preview of the front of card 3

Card 4

Front

How have the cuticles adapted?

Back

Preview of the front of card 4

Card 5

Front

Why do some hydrophytes ahve a reduced structure?

Back

Preview of the front of card 5
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