जीव विज्ञान – Biology MCQ
जीव विज्ञान – कृषि/वन प्रवेश
Biology · Agriculture, Veterinary & Forestry Entrance · ८४० प्रश्न
८४० प्रश्न उपलब्ध। मोड छान्नुहोस्:
जीव विज्ञान: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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The scientific name of the mulberry silkworm is:
सही उत्तर: घ) Bombyx mori
Bombyx mori feeds on mulberry leaves and is reared in sericulture. Antheraea mylitta produces tasar silk, and Kerria lacca is the lac insect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The heart of a fish has:
सही उत्तर: क) Two chambers
A fish heart has one atrium and one ventricle and pumps only deoxygenated blood (single circulation). Most amphibians have a three-chambered heart.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Kala-azar is caused by:
सही उत्तर: ग) Leishmania donovani
Kala-azar (visceral leishmaniasis) is caused by Leishmania donovani and spread by sand flies. Trypanosoma gambiense causes sleeping sickness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Malaria is transmitted to humans by the bite of an infected:
सही उत्तर: क) Female Anopheles mosquito
Plasmodium enters humans when a female Anopheles bites, since only females suck blood. Female Culex transmits filariasis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The intermediate host of the pork tapeworm Taenia solium is the:
सही उत्तर: घ) Pig
Humans get Taenia solium by eating undercooked pork containing cysts, so the pig is the intermediate host. Taenia saginata is the tapeworm whose intermediate host is cattle.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The liver fluke Fasciola hepatica belongs to the phylum:
सही उत्तर: ग) Platyhelminthes
Fasciola is a flatworm (Platyhelminthes) that damages the bile ducts of sheep and cattle, with snails as intermediate hosts. Roundworms such as Ascaris belong to Nematoda.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Anthrax in livestock is caused by:
सही उत्तर: घ) Bacillus anthracis
Anthrax is caused by the spore-forming bacterium Bacillus anthracis and can spread to humans. Brucella abortus causes brucellosis (contagious abortion) in cattle.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Foot and mouth disease (FMD) of cattle is caused by a:
सही उत्तर: ख) Virus
FMD is a highly contagious viral disease of cloven-hoofed animals, causing blisters in the mouth and on the feet. It is controlled by vaccination.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Rabies is caused by a:
सही उत्तर: ग) Virus
Rabies is a viral disease of the nervous system spread mainly by bites of infected dogs. It is nearly always fatal once symptoms appear, but it can be prevented by vaccination.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Insulin is secreted by:
सही उत्तर: ग) Beta cells of the islets of Langerhans
Beta cells of the pancreas secrete insulin, which lowers blood glucose. Alpha cells secrete glucagon, which raises blood glucose.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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