वनस्पति विज्ञान – Botany – Botany MCQ

वनस्पति विज्ञान – Botany: प्रश्न र उत्तर

सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।

सही: ० / ०

11. Which cellular compartment plays a critical role in the initial steps of photorespiration when RuBisCO fixes oxygen instead of carbon dioxide?

    कA) The Golgi apparatus. खB) The endoplasmic reticulum. गC) The chloroplast stroma. घD) The mitochondria.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

12. The presence of ‘starch sheath’ around the developing embryo in barley seeds primarily serves what protective function?

    कA) It protects against fungal pathogens by releasing antifungal compounds. खB) It provides insulation against extreme temperature fluctuations. गC) It acts as a barrier preventing premature germination and desiccation. घD) It facilitates nutrient absorption from the endosperm during early development.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

13. In the case of flowering plants, what is the primary significance of the process known as ‘colchicine effect’?

    कA) It induces mutations leading to increased fruit yield. खB) It prevents homologous chromosomes from pairing during meiosis. गC) It promotes cross-pollination between different plant species. घD) It accelerates cell division in root tips for rapid growth.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

14. The presence of specialized cells called collenchyma provides which vital support function in plant stems?

    कRigid cellulose fiber strength खFlexible expansion and growth resistance गRapid water transport between tissues घEfficient nutrient absorption from the soil
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

15. The phenomenon where a plant produces multiple embryos within a single seed is called:

    कPolyembryony खParthenocarpy गApomixis घAdventitious Embryony
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

16. The process of pollination facilitated by wind is known as:

    कHydrophily खAnemophily गZoochory घChrysophily
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

17. Which of the following describes a key characteristic of CAM plants?

    कThey are C3 plants that thrive in high light conditions खThey utilize crassulacease acid metabolism to minimize water loss गThey perform photosynthesis exclusively during the daytime घThey rely on bundle sheath cells for efficient carbon fixation
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

18. The term ‘chloroplast’ refers to:

    कA type of fungal cell खThe green pigment in plant leaves गAn organelle involved in protein synthesis घThe root structure of a vascular plant
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

19. The phenomenon where a plant bends towards light source is known as:

    कPhototropism खThigmotropism गGravitropism घHydrotropism
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

20. The term ‘phyllotaxy’ refers to:

    कA) The arrangement of vascular tissues within a leaf. खB) The arrangement of leaves around the stem. गC) The color and pattern of plant pigments. घD) The development of new root nodules.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।