SPSC BOTANY 25 YEARS PAST PAPERS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
میٹھا آلو ______ کی ترمیم ہے؟
- Bud
- Root
- Stem
- None of these
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Explanation
Sweet potato is a modified root known as a tuberous root, which stores starch.It differs from potato, which is a modified stem (tuber).
سب سے بڑا بیضوی ______ کی ہے؟
- Cycas
- Cocos
- Gnetum
- None of these
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Explanation
Cycas has the largest ovule among plants, which is visible to the naked eye.It is a gymnosperm with a unique reproductive structure, producing large seeds.
- Outgrowth of funiculus
- Surviving nucleus in the seed
- Outgrowth of the outer integument
- None of these
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Explanation
Perisperm is the remnant of the nucellus that persists in some seeds and provides nutrition.It is different from the endosperm, which is formed after fertilization.It also provides nutrients to the developing embryo.
جمناسپرم میں مندرجہ ذیل میں سے کون سا فرٹلائجیشن ہے؟
- Mesogamous
- Chalazogamous
- Porogamous
- None of these
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Explanation
Porogamy is the common type of fertilization in gymnosperms, where the pollen tube enters the ovule through the micropyle.This process ensures the direct delivery of male gametes to the egg for fertilization.
ایک فرن ______ کے کائی سے مختلف ہے؟
- An independent sporophyte
- An independent gametophyte
- Swimming archegonia
- None of these
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Explanation
In ferns, the sporophyte (diploid) is the dominant, independent generation, whereas in mosses, the gametophyte (haploid) is dominant.Fern sporophytes have vascular tissues (xylem and phloem), while mosses rely on diffusion for water and nutrient transport.
زیادہ تر سی فور پودے _____ میں پائے جاتے ہیں؟
- Grasses
- Gymnosperms
- Bryophytes
- None of these
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Explanation
C₄ plants, like maize, sugarcane, and sorghum.They are mainly found in the grass family (Poaceae) and thrive in warm climates.They use the C₄ photosynthetic pathway, which reduces photorespiration and improves efficiency in high temperatures.
انتہائی ترمیم شدہ پودوں کی شوٹ جس میں ایک چھوٹا سا تنے گھنے موٹے مانسل پتے سے گھرا ہوا ہے؟
- Corm
- Bulb
- Tuber
- None of these
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Explanation
Bulb is an underground modified stem with a short stem surrounded by fleshy leaves that store food (e.g., Onion, Garlic).It helps plants survive unfavorable conditions and regrow when conditions improve.
- Series of biotic communities that appear in a bare area
- Series of physical changes that occur in an area
- Development of climax vegetation
- None of these
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Explanation
Succession is the natural process of gradual replacement of plant and animal communities in an ecosystem over time.It occurs in stages, leading to the establishment of a stable climax community.
- Science of agriculture
- Science of flowers
- Study or practice of growing flowers, fruits, vegetables, and gardening
- None of these
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Explanation
Horticulture deals with the cultivation, management, and study of fruits, vegetables, flowers, and ornamental plants.It is a branch of agriculture that focuses on improving plant growth, yield, and quality.
بیضوی میں جرگ ٹیوب کے داخلے کا سب سے عام طریقہ _____ کہا جاتا ہے؟
- Mesogamy
- Porogamy
- Chalazogamy
- None of these
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Explanation
Porogamy is the most common method where the pollen tube enters the ovule through the micropyle.This ensures direct fertilization by delivering male gametes to the embryo sac.
