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Human Health and Disease MCQs
Class XII Biology
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NCERT Based
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NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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446 questions in this chapter
Question 201 of 446
📘 CLASS XII
____ act as mechanical carriers and transmit the amoebiasis parasite from faeces to food.
Houseflies act as mechanical carriers and serve to transmit the parasite.
Question 202 of 446
📘 CLASS XII
A serious symptom of ascariasis, caused by the roundworm *Ascaris*, is the blockage of the ____ passage.
Symptoms of ascariasis include internal bleeding, muscular pain, fever, anemia and blockage of the intestinal passage.
Question 203 of 446
📘 CLASS XII
Elephantiasis (filariasis) usually causes chronic inflammation of the ____ vessels of the lower limbs.
*Wuchereria* causes chronic inflammation, usually in the lymphatic vessels of the lower limbs.
Question 204 of 446
📘 CLASS XII
Fungi belonging to the genera Microsporum, Trichophyton, and ____ are responsible for ringworms.
The fungi genera responsible for ringworms are *Microsporum*, *Trichophyton* and *Epidermophyton*.
Question 205 of 446
📘 CLASS XII
____ and moisture help ringworm fungi to grow, which makes them thrive in skin folds.
Heat and moisture help these fungi to grow, which makes them thrive in skin folds.
Question 206 of 446
📘 CLASS XII
Proper disposal of waste and ____ is an essential public hygiene measure to prevent infectious diseases.
Public hygiene includes proper disposal of waste and excreta.
Question 207 of 446
📘 CLASS XII
Introducing fishes like ____ in ponds helps control malaria and filariasis by feeding on mosquito larvae.
Introducing fishes like Gambusia in ponds that feed on mosquito larvae is a vector control measure.
Question 208 of 446
📘 CLASS XII
Recent widespread incidences of dengue and chikungunya are linked to ____ mosquitoes.
Widespread incidences of the vector-borne (*Aedes* mosquitoes) diseases like dengue and chikungunya have been noted.
Question 209 of 446
📘 CLASS XII
The use of vaccines has enabled the complete eradication of the deadly disease ____.
The use of vaccines and immunisation programmes have enabled the complete eradication of smallpox.
Question 210 of 446
📘 CLASS XII
The overall ability of the host to fight disease-causing organisms, conferred by the immune system, is called ____.
This overall ability of the host to fight the disease-causing organisms is called immunity.
