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8 Cards in this Set
- Front
- Back
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What is rose black spot? |
A fungus that causes purple or black spots to develop on the leaves of rose plants. The leaves can then turn yellow and drop off. |
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Symptoms of rose black spot |
The leaves can turn yellow and drop off. |
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How does rose black spot affect the growth of a plant? |
When the leaves turn yellow and drop off it means that less photosynthesis can happen, so the plant doesn't grow very well. |
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How is rose black spot spread? |
It spreads through the environment in water or by the wind |
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What is malaria? |
A disease caused by a protist and spread by mosquitos, which causes repeating episodes of fever |
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What is malaria caused by? |
A protist. Part of the malarial protisit's life cycle takes place inside the mosquito. The mosquitos are vectors-they pick up the malarial protist when they feed on an infected animal. Every time the mosquito feeds on another animal, it infects it by inserting the protist into the animal's blood vessels. |
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How can the spread of malaria be controlled? |
The spread of malaria can be reduced by stopping the mosquitos from breeding. E.g. Mosquitos can breed in standing water, so mosquitos can be prevented from breeding by removing these water sources.E.g. People who live in areas with a risk of malaria should make sure that they empty or get rid of any containers on their land that fill with rainwater |
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How can people be protected from mosquito bites? |
>Spraying any exposed skin with an insect repellant can prevent people from being bitten by mosquitos >Sleeping under a mosquito net can prevent people from being bitten when they're asleep. |
