कृषि, पशु र वन विज्ञान प्रवेश
कृषि, पशु र वन विज्ञान प्रवेश
Agriculture, Veterinary & Forestry Entrance · २,४९३ प्रश्न
२,४९३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कृषि/वन प्रवेश: 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 five-kingdom classification was proposed by:
सही उत्तर: क) R.H. Whittaker
Whittaker (1969) classified organisms into Monera, Protista, Fungi, Plantae and Animalia.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is a vestigial organ in humans?
सही उत्तर: क) Vermiform appendix
The vermiform appendix is a reduced, largely non-functional remnant of a larger caecum in ancestors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Industrial melanism in the peppered moth (Biston betularia) is a classic example of:
सही उत्तर: क) Natural selection
Dark moths were better camouflaged on soot-covered trees and were selected by bird predation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Stanley Miller's experiment simulating primitive earth conditions produced:
सही उत्तर: ख) Amino acids
Electric sparks in a mixture of CH4, NH3, H2 and water vapour produced simple organic compounds such as amino acids.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the Hardy-Weinberg equilibrium, if the frequency of the recessive allele q = 0.3, what is the frequency of heterozygotes?
सही उत्तर: घ) 0.42
p = 1 - 0.3 = 0.7; heterozygote frequency = 2pq = 2 × 0.7 × 0.3 = 0.42.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The mutation theory of evolution was proposed by Hugo de Vries based on his studies of:
सही उत्तर: क) Oenothera lamarckiana
De Vries observed sudden heritable changes in the evening primrose, Oenothera lamarckiana.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Wings of a butterfly and wings of a bird are:
सही उत्तर: ग) Analogous organs
They perform the same function but have different origin and structure, which indicates convergent evolution.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The forelimbs of a whale, a bat and a human are examples of:
सही उत्तर: घ) Homologous organs
They share the same basic structure and origin but perform different functions, so they are homologous (divergent evolution).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Human skin colour, controlled by several genes with additive effect, is an example of:
सही उत्तर: ग) Polygenic inheritance
Skin colour is controlled by three or more gene pairs with cumulative effect, i.e. polygenic (quantitative) inheritance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The term 'gene' was coined by:
सही उत्तर: ख) Wilhelm Johannsen
Johannsen coined 'gene' in 1909; Bateson coined 'genetics', and Mendel called them 'factors'.
💬 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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