BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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feeding on a host animal
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a random mutation that is more common in small organisms
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breeding in areas that are very humid
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all of these
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Detailed explanation-1: -Biological vectors, such as mosquitoes and ticks may carry pathogens that can multiply within their bodies and be delivered to new hosts, usually by biting. Mechanical vectors, such as flies can pick up infectious agents on the outside of their bodies and transmit them through physical contact.
Detailed explanation-2: -Diseases that are spread to people by mosquitoes include Zika virus, West Nile virus, Chikungunya virus, dengue, and malaria.
Detailed explanation-3: -Ticks are considered to be second worldwide to mosquitoes as vectors of human diseases, but they are the most important vectors of disease-causing pathogens in domestic and wild animals.
Detailed explanation-4: -Vectors of human and animal pathogens are haematophagous, i.e. they feed on blood. They include some mosquitoes, ticks, Culicoides, sandflies, fleas and horseflies.