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

101. The process of vegetative propagation, where new plants arise from parts of the parent plant, is most effectively achieved through: a) Cross-pollination between different plant varieties. b) Production of specialized structures like bulbs, tubers, or rhizomes. c) Direct injection of hormones into the plant’s vascular system to stimulate growth. d) The application of fertilizers to promote root development.

     कa) Cross-pollination between different plant varieties. खb) Production of specialized structures like bulbs, tubers, or rhizomes. गc) Direct injection of hormones into the plant’s vascular system to stimulate growth. घd) The application of fertilizers to promote root development.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

102. Which of the following represents a key difference between xylem and phloem tissues within a flowering plant? a) Xylem transports sugars produced during photosynthesis while phloem transports water and minerals. b) Phloem carries amino acids, while xylem conducts starch. c) Xylem transports water and minerals upwards from roots to shoots, whereas phloem transports sugars downwards from leaves to other parts of the plant. d) Both tissues primarily transport oxygen throughout the plant.

     कa) Xylem transports sugars produced during photosynthesis while phloem transports water and minerals. खb) Phloem carries amino acids, while xylem conducts starch. गc) Xylem transports water and minerals upwards from roots to shoots, whereas phloem transports sugars downwards from leaves to other parts of the plant. घd) Both tissues primarily transport oxygen throughout the plant.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

103. The presence of specialized cells called collenchyma in plant stems contributes significantly to: a) Increased photosynthetic efficiency. b) Providing structural support and flexibility, enabling growth. c) Facilitating the movement of water and nutrients through the stem. d) Regulating transpiration rates.

     कa) Increased photosynthetic efficiency. खb) Providing structural support and flexibility, enabling growth. गc) Facilitating the movement of water and nutrients through the stem. घd) Regulating transpiration rates.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

104. Which of the following statements accurately describes the function of CAM photosynthesis in plants like cacti? a) It occurs continuously throughout the day and night. b) It involves opening stomata during the day to maximize CO2 uptake. c) It utilizes an initial ‘crassulacean acid metabolism’ (CAM) pathway to fix carbon dioxide at night, reducing water loss during the day. d) It relies solely on C4 photosynthetic pathways for efficient carbon fixation.

     कa) It occurs continuously throughout the day and night. खb) It involves opening stomata during the day to maximize CO2 uptake. गc) It utilizes an initial ‘crassulacean acid metabolism’ (CAM) pathway to fix carbon dioxide at night, reducing water loss during the day. घd) It relies solely on C4 photosynthetic pathways for efficient carbon fixation.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

105. The process of converting inorganic compounds into organic compounds within plant cells is known as: a) Photosynthesis b) Respiration c) Translocation d) Osmosis

     कa) Photosynthesis खb) Respiration गc) Translocation घd) Osmosis
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

106. Free central placentation is typically found in which plant family?

     कOrchidaceae खFabaceae गAsteraceae घLamiaceae
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

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107. In the F₂ generation of a trihybrid cross (AaBbCc × AaBbCc) with independent assortment and complete dominance, what is the expected phenotypic ratio for the trait 'B', assuming all possible phenotypes are expressed?

     क3:1 ख9:3:3:1 ग27:9:9:9 घ1:2:1
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

108. The progeny obtained from self-pollination of a plant with the genotype AaBbCc will exhibit a phenotypic ratio of 9:3:3:1. What is the expected proportion of plants with the genotype Aabbcc in this offspring?

     क1/8 ख1/4 ग1/2 घ3/8
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

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     टिप्पणी जाँचपछि मात्र देखिन्छ।

109. What is the primary role of stomata in leaves?

     कAbsorption of carbon dioxide from the atmosphere खRegulation of transpiration and exchange of gases (carbon dioxide and oxygen) गStorage of starch and sugars घAnchoring the leaf to the stem
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

110. Which of the following is a characteristic feature of Bryophytes (mosses)?

     कThey have true vascular tissues (xylem and phloem) खThey are capable of independent nutrition and photosynthesis गThey require water for reproduction (fertilization occurs outside the plant) घThey possess seeds for dispersal
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।