वनस्पति विज्ञान – Botany – Botany MCQ

वनस्पति विज्ञान – Botany: प्रश्न र उत्तर

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सही: ० / ०

201. The term 'etiolation' in botany refers to: (a) The process of leaf abscission (falling off). (b) Rapid growth due to excessive light exposure. (c) Abnormal growth resulting from prolonged darkness, characterized by elongated stems and pale leaves. (d) The decomposition of organic matter.

     क(a) The process of leaf abscission (falling off). ख(b) Rapid growth due to excessive light exposure. ग(c) Abnormal growth resulting from prolonged darkness, characterized by elongated stems and pale leaves. घ(d) The decomposition of organic matter.
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202. Which of the following is a characteristic feature of monocotyledonous plants? (a) Scattered vascular bundles in stem (b) Distinct ring of vascular bundles in stem (c) Presence of secondary xylem and phloem (d) Parallel leaf venation

     क(a) Scattered vascular bundles in stem ख(b) Distinct ring of vascular bundles in stem ग(c) Presence of secondary xylem and phloem घ(d) Parallel leaf venation
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203. The process of pollination is crucial for plant reproduction. Which of the following best describes its significance? (a) It ensures that only healthy seeds are produced. (b) It facilitates the absorption of nutrients by the developing embryo. (c) It involves the transfer of pollen from the anther to the stigma, enabling fertilization. (d) It directly regulates the rate of photosynthesis in the plant.

     क(a) It ensures that only healthy seeds are produced. ख(b) It facilitates the absorption of nutrients by the developing embryo. ग(c) It involves the transfer of pollen from the anther to the stigma, enabling fertilization. घ(d) It directly regulates the rate of photosynthesis in the plant.
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204. Which of the following statements accurately describes the role of stomata in plants? (a) Stomata primarily absorb carbon dioxide for photosynthesis. (b) Stomata regulate gas exchange (carbon dioxide and oxygen) and water vapor transpiration. (c) Stomata are involved in nutrient absorption from the soil. (d) Stomata contribute directly to the production of chlorophyll.

     क(a) Stomata primarily absorb carbon dioxide for photosynthesis. ख(b) Stomata regulate gas exchange (carbon dioxide and oxygen) and water vapor transpiration. ग(c) Stomata are involved in nutrient absorption from the soil. घ(d) Stomata contribute directly to the production of chlorophyll.
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205. The main function of phloem in plants is: (a) Absorption of water and minerals from the soil (b) Transport of sugars produced during photosynthesis (c) Providing structural support to the plant stem (d) Facilitating gaseous exchange between the leaf and atmosphere

     क(a) Absorption of water and minerals from the soil ख(b) Transport of sugars produced during photosynthesis ग(c) Providing structural support to the plant stem घ(d) Facilitating gaseous exchange between the leaf and atmosphere
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206. In a typical flower, what is the primary function of the filament?

     कA) To attract pollinators with its vibrant colors and fragrance. खB) To support the anther and protect it during pollen development. गC) To facilitate the transfer of pollen from the stamen to the pistil. घD) To collect nectar produced by the flower.
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207. The phenomenon of crassulacean acid metabolism (CAM) in plants is primarily an adaptation to:

     कA) High levels of atmospheric carbon dioxide. खB) Environments with high light intensity and rapid water loss. गC) Nutrient-poor soils and a need for efficient carbon fixation. घD) Cold temperatures and reduced photosynthetic rates.
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208. Which of the following processes is directly responsible for the creation of secondary xylem (wood) in a tree?

     कA) Cellular division within the apical meristems. खB) The activity of cambium cells, which produce new phloem and xylem layers. गC) The deposition of tannins to deter herbivores. घD) The absorption of water and minerals from the soil through root hairs.
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209. The term 'alternation of generations' refers to the life cycle of plants where:

     कA) Plants alternate between a sporophyte and a gametophyte generation in a single organism. खB) Plants produce seeds that contain both male and female reproductive tissues. गC) Plants undergo distinct phases with alternating dominance of haploid (n) and diploid (2n) generations. घD) Plants possess specialized cells called meristems responsible for growth.
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210. Which of the following statements best describes the function of stomata in plant leaves?

     कA) They are primarily involved in carbon dioxide uptake for photosynthesis. खB) They regulate gas exchange (carbon dioxide and oxygen) and water transpiration. गC) They facilitate the absorption of nutrients from the soil. घD) They are responsible for transporting water throughout the plant's vascular system.
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