if they don't get enough mineral ions from the soil
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what are nitrates needed for in plants and what happens if there is a lack of them?
Nitrates are needed to make proteins for growth. A lack of nitrated causes stunted growth
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what are magnesium ions needed for in plants and what happens if plants don't get enough?
Magnesium ions are needed to make chlorophyll needed in photosynthesis. plants without enough magnesium suffer from chlorosis and have yellow leaves
3 of 12
give two other ways plants can get diseases apart from lack of nitrates and magnesium ions
plants can get infected by viral, fungal and bacterial pathogens. They can also get infested and infected by insects e.g aphids
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give a minimum of 4 signs of diseases noticable on plants
stunned growth, abnormal growth (lumps), patches of decay (rot), spots on leaves, discolouration, malformed stems
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Give a physical defence plants use to protect themselves from diseases
plants create barriers to stop pathogens entering; most plant leaves have a waxy cuticle layer which provides a barrier. Also plant cells have thick cell walls to stop pathogens entering
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give a chemical defence plants use to protect themselves from diseases
some plants produce antibacterial chemicals which kill bacteria e.g a mint plant. Other plants produce poison which can deter herbivores e.g tobacco, foxglove
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give a mechanical defence plants use to protect themselves from diseases
some plants are adapted to have thorns or hairs to protect themselves. Other plants mimic other deadlier organisms - e.g their colour to stop animals from coming near them. some plants have leaves that droop if something touches them to protect them
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what do fertilisers contain which helps plants to grow
fertilisers contain minerals such as nitrogen, potassium and phosphorous which help plants to grow: N:P:K
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how are most chemical fertilisers made?
by the reaction of acids and alkali
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do fertilisers help or hinder crop yields?
the increase crop yields as the help plants to grow faster and bigger
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how do plants get the fertilisers?
Fertilisers are minerals, which must first dissolve in water so that plants can absorb them through their roots.
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Other cards in this set
Card 2
Front
what are nitrates needed for in plants and what happens if there is a lack of them?
Back
Nitrates are needed to make proteins for growth. A lack of nitrated causes stunted growth
Card 3
Front
what are magnesium ions needed for in plants and what happens if plants don't get enough?
Back
Card 4
Front
give two other ways plants can get diseases apart from lack of nitrates and magnesium ions
Back
Card 5
Front
give a minimum of 4 signs of diseases noticable on plants
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