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Explanation:
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Answer:
Q. 1 (a)
Ans
I don't know.
Q. 2 (b)
Ans
Malaria is caused by the Plasmodium parasite. The parasite can be spread to humans through the bites of infected mosquitoes. There are many different types of plasmodium parasite, but only 5 types cause malaria in humans.
Q. 3 (C)
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All viruses that spread within their host tissues (systemically) can be transmitted by grafting branches or buds from diseased plants on healthy plants. Natural grafting and transmission are possible by root grafts and with parasitic dodder (Cuscuta species). Vegetative propagation often spreads plant viruses.
Q. 4 (d)
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Plant pathogens
Fungi.
Fungus-like organisms.
Bacteria.
Viruses, viroids and virus-like organisms.
Nematodes.
Protozoa and algae.
Parasitic plants.
Explanation:
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