Term
| When and why did aquatic plants invade life on land? |
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Definition
| Millions of years they had to evlolve for life on land |
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Term
What tasks did these plants need for survival on land? |
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Definition
- support of leaves and other parts so won't collapase
- get sunlight
- obtain water and mineral from the soil
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Term
| How did they transport food, water and minterals from one part of the plant to another? |
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Definition
- water and minerals are taken up from the bottom
- food made from the top
- food has to get to the bottom
- water and minerals have to get to the top
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Term
| What other tasks for survival are needed? |
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Definition
- prevent excess water loss into the air (evaporation)
- get sperm and egg cells together for reproduction
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Term
| What are mosses, liverwarts and hornworts and where do they live? |
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Definition
- the are tiny plants
- they live on wet rocks, damp tree bark, muddy banks of streams and ponds, bogs and forests where they cover the ground.
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Term
| What is a few speical adaptations for the line on land? |
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Definition
- Leaf support
- small, to the ground so they don't need stems
- have rigid cells walls which provide support
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Term
| How do mosses (etc) obtain water and minerals? |
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Definition
| They obsorb water and minerals through their entire body surface |
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Term
| How do mosses (etc) transport food? |
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Definition
The minerals go from one cell to the next - not very efficient, but good enough when you are tiny |
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Term
| How do mosses (etc.) prevent water loss? |
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Definition
- live in moist envirnoment
- only reproductive cells have water tight coat
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Term
| How do mosses (etc.) reproductive cells meet? |
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Definition
Sperms cells swim to the egg cells when plant is covered with rain water or dew |
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Term
What are the uses for Sphagnum mosses? |
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Definition
- enrich soil
- keeps soil moist
- change chemistry of soil for certain plants like azaleas
- prevent growth of certain disease causing bateria and fungi when added to the soil
- keep wounds from getting infected WWI
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Term
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Definition
- accumulated layers of sphagnum moss
- added to soil to improve it's ability to hold water
- can be dried and used as fuel
- peat bogs presever many things including human bodies
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