Pathogens are microorganisms that cause diseases - AQA - GCSE Biology Combined Science - Question 4 - 2021 - Paper 1
Question 4
Pathogens are microorganisms that cause diseases. Gonorrhoea, malaria and measles are three diseases in humans.
Draw one line from each disease to the pathogen that... show full transcript
Worked Solution & Example Answer:Pathogens are microorganisms that cause diseases - AQA - GCSE Biology Combined Science - Question 4 - 2021 - Paper 1
Step 1
Draw one line from each disease to the pathogen that causes the disease.
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Answer
Disease
Pathogen
Gonorrhoea
Bacterium
Malaria
Protist
Measles
Virus
Step 2
Explain how releasing sterile mosquitoes reduces the spread of malaria.
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Answer
Releasing sterile mosquitoes reduces breeding and reproduction in the mosquito population. By allowing males that are sterilized to mate, no offspring are produced, which decreases the overall number of mosquitoes capable of spreading malaria.
Step 3
Name the piece of equipment used to view the virus.
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Answer
Electron microscope.
Step 4
How many times longer is the fungal spore than the virus?
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The fungal spore is approximately 64 times longer than the virus.
Step 5
Explain why plants infected with tobacco mosaic virus grow slowly.
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Answer
Infection leads to discolouration in the leaves and reduces chlorophyll levels, which in turn decreases photosynthesis. Consequently, less glucose is produced, limiting the plant's ability to synthesize essential substances.
