कृषि, पशु र वन विज्ञान B.Sc. Forestry प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Forestry प्रवेश
B.Sc. Forestry Entrance · Agriculture, Veterinary & Forestry Entrance
२,४९३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कृषि, पशु र वन विज्ञान 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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Melvin Calvin worked out the path of carbon in photosynthesis using radioactive carbon-14 in the alga:
सही उत्तर: घ) Chlorella
Calvin and colleagues traced 14C in Chlorella to establish the C3 (Calvin) cycle.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The cohesion-tension (transpiration pull) theory of the ascent of sap was proposed by:
सही उत्तर: क) Dixon and Joly
H.H. Dixon and J. Joly (1894) explained the ascent of sap by cohesion of water molecules and transpiration pull.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The cork cambium of a woody plant is also known as:
सही उत्तर: ख) Phellogen
Phellogen produces cork (phellem) outward and secondary cortex (phelloderm) inward.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Lenticels on the bark of woody stems help in:
सही उत्तर: ख) Exchange of gases
Lenticels are loosely packed openings in the periderm that allow gaseous exchange.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The dark, central, non-conducting wood of an old tree trunk, filled with tannins and resins, is called:
सही उत्तर: ग) Heartwood (duramen)
Heartwood is the inner, dead, darker wood; the outer functional wood is sapwood.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Mustard belongs to the family:
सही उत्तर: घ) Brassicaceae (Cruciferae)
Mustard, cabbage and radish are members of Brassicaceae, with cross-shaped (cruciform) corollas.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Vessels are generally absent in the xylem of:
सही उत्तर: ग) Gymnosperms
Gymnosperm xylem consists mainly of tracheids; vessels are characteristic of angiosperms (Gnetum is an exception).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In roots, xylem and phloem lie on different radii alternating with each other. Such vascular bundles are called:
सही उत्तर: ग) Radial
Roots have radial vascular bundles where xylem and phloem strands alternate on separate radii.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Vascular bundles of a dicot stem are described as:
सही उत्तर: क) Conjoint, collateral and open
Dicot stem bundles have xylem and phloem on the same radius (conjoint, collateral) with cambium between them (open).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which feature is typical of a monocotyledonous plant?
सही उत्तर: ग) Parallel venation in leaves
Monocots usually have parallel venation, fibrous roots, scattered vascular bundles and trimerous flowers.
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
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