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

141. Which of the following statements accurately describes the process of pollination in flowering plants? (A) Pollen grains are transported by insects to the stigma. (B) Pollen grains germinate on the stigma and grow a pollen tube down to the ovule. (C) Seeds develop directly from petals after fertilization. (D) Stomata facilitate the transfer of pollen between flowers.

     कPollen grains are transported by insects to the stigma. खPollen grains germinate on the stigma and grow a pollen tube down to the ovule. गSeeds develop directly from petals after fertilization. घStomata facilitate the transfer of pollen between flowers.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

142. The primary function of the Casparian strip in the root endodermis is: (A) To facilitate water movement into the xylem. (B) To regulate the uptake of minerals from the soil. (C) To provide structural support to the root cells. (D) To allow for gas exchange between the cytoplasm and the surrounding soil.

     कTo facilitate water movement into the xylem. खTo regulate the uptake of minerals from the soil. गTo provide structural support to the root cells. घTo allow for gas exchange between the cytoplasm and the surrounding soil.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

143. The phenomenon of 'geinardia' in grass leaves, where a large, empty, colorless epidermal cell rolls inward, creating a channel, occurs due to: a) Increased water uptake. b) Cell division leading to new leaf formation. c) Abnormal cell expansion and subsequent rupture. d) The accumulation of pigments

     कa) Increased water uptake. खb) Cell division leading to new leaf formation. गc) Abnormal cell expansion and subsequent rupture. घd) The accumulation of pigments
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

144. In *Pinus* cones, pollination occurs before: a) Gametophyte generation. b) Sporophyte generation. c) Seed germination. d) Bud development.

     कa) Gametophyte generation. खb) Sporophyte generation. गc) Seed germination. घd) Bud development.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

145. The phenomenon of 'crinkling' or rolling inward of leaf segments in plants like *Opuntia* is primarily due to: a) Increased production of chlorophyll. b) Accumulation of starch within the cells. c) Expansion of epidermal cells and increased turgor pressure. d) Formation of new vascular tissues.

     कa) Increased production of chlorophyll. खb) Accumulation of starch within the cells. गc) Expansion of epidermal cells and increased turgor pressure. घd) Formation of new vascular tissues.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

146. Which of the following statements accurately describes mycorrhizae? a) A parasitic relationship between fungi and plant roots. b) A mutualistic symbiotic association between fungi and plant roots, enhancing nutrient absorption for the plant. c) A pathogenic infection caused by fungal spores damaging plant tissues. d) Competition between fungi and plant roots for water resources.

     कa) A parasitic relationship between fungi and plant roots. खb) A mutualistic symbiotic association between fungi and plant roots, enhancing nutrient absorption for the plant. गc) A pathogenic infection caused by fungal spores damaging plant tissues. घd) Competition between fungi and plant roots for water resources.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

147. The vascular bundles in a young bamboo shoot show cambium activity. This indicates that the plant is undergoing: a) Primary growth only b) Secondary growth only c) Both primary and secondary growth d) Apical dominance

     कa) Primary growth only खb) Secondary growth only गc) Both primary and secondary growth घd) Apical dominance
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

148. The cyathium inflorescence is a unique floral arrangement found in certain plants. What is the primary characteristic that defines this type of inflorescence?

     कA single flower head with multiple petals खA branched structure bearing numerous small flowers गA structure resembling an artichoke, with ‘mutia’ (flower clusters) arising from a central axis घA spike-like arrangement of flowers
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

149. The phenomenon of 'geitonospory' is most closely associated with which plant group?

     कA. Orchids खB. Grasses गC. Ferns घD. Mosses
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

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150. Which of the following groups of plants is characterized by cones bearing seeds?

     कA. Ferns खB. Flowering Plants (Angiosperms) गC. Gymnosperms घD. Bryophytes
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।