Transpiration is the movement of water up through the xylem of a plant from the roots up to the leaves.
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Which four ways can you increase the rate of transpiration?
You can increase the rate of transpiration by; Having a high light intensity, increasing air movement (wind), increasing temperature and ecreasing the humidity.
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What are the two adaptations of a plant that are used to redue water loss?
A waxy cuticle and having most stomata on the lower surface of a leaf reduce water loss.
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What are stomata?
Stomata are tiny pores which let carbon dioxide in, and water vapour and oxygen out.
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What controls the stomata?
Gaurd cells control the stomata. They close the stomata when its necessary.
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What happens when water molecules move into the gaurd cells?
The gaurd cells swell due to the water and become turgid (this is caused by osmosis)
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Which 4 minerals do plants need to be healthy?
Phosphate- for respiration and growth. Nitrate- to build protiens and growth. Potassium- For respiration and photosynthesis. Magnesium- For photosynthesis and chlorophyll.
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What deficiency symptoms could a lack in these minerals cause?
Nitrate- Yellow leaves and poor growth. Phosphate- Poor root groth and purple leaves. Potassium- Poor flower and root growth, dicoloured leaves. Magnesium- Yellow leaves.
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What is active transport?
Active transport is when particles move against a concentration gradient, and therefore requires energy which must be supplied by a cell.
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How is this different to diffusion?
It is different to diffusion as diffusion moves down the concentration gradient and requires no energy in order to do this.
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What conditions are needed for decay?
Warmer temperature, more oxygen, and moist conditions increases the speed of deay.
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What is natural recycling?
Natural recyling is a biological process which occurs on a continuous basis within the natural environment. Organic matter is broken down by detritovores + small parts are eaten. Decomposers break this down+release compounds into soil used by plants.
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What are the seven mechanisms used to prevent decay?
Canning, cooling, freezing, adding salt, vinegar and salt, and drying.
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Whats an argument for selective breeding?
It can improve crops and livestock, eg increasing disease resistance or milk yeild.
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What is an argument against selective breeding?.
It can have a negative effect on the organisms.
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Name 3 methods of inensive farming.
Using herbicides, pesticides and battery farming are all methods of intensive farming.
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What is organic farming?
Organic farming is a type of farming which relies upon more natural forms, without using chemical fertilisers or feed additives. This includes using manure, and farming free range livestock.
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Other cards in this set
Card 2
Front
Which four ways can you increase the rate of transpiration?
Back
You can increase the rate of transpiration by; Having a high light intensity, increasing air movement (wind), increasing temperature and ecreasing the humidity.
Card 3
Front
What are the two adaptations of a plant that are used to redue water loss?
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