LECTURER BOTANY PAST PAPER 08-02-2011 BY SPSC
Lecturer Botany Past Papers Click here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- 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.
ہم آہنگی والے اسٹیمنز (فیوزڈ انتھٹرز) کس کنبے میں پائے جاتے ہیں؟
- Annonaceae
- Asteraceae
- Cucurbitaceae
- None of these
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Explanation
Syngenesious stamens (fused anthers) are characteristic of the Asteraceae (Compositae) family.In this type, anthers are united to form a tube around the style, aiding in pollen dispersal.
بیجوں کے انکرن کے لئے ضروری شرائط _____ ہیں؟
- Moisture, O₂, and suitable temperature
- CO₂, light, and O₂
- Light, O₂, and suitable temperature
- None of these
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Explanation
Moisture is essential to activate enzymes and initiate metabolic processes in the seed.Oxygen is required for respiration, and a suitable temperature ensures proper enzymatic activity for growth.
شمسی توانائی کی زیادہ سے زیادہ تعی .ن ______ کے ذریعہ کی جاتی ہے؟
- Green plants
- Fungi
- Man
- None of these
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Explanation
Green plants fix solar energy through photosynthesis.It converting sunlight into chemical energy.They use chlorophyll to absorb light and produce glucose, supporting the food chain.
کی عمر تلاش کرنے کے لئے ریڈیو کاربن ڈیٹنگ کا استعمال کیا جاتا ہے؟ _____
- Plants
- Rocks
- Fossils
- None of these
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Explanation
- Carbon dating is used to estimate the age of fossils.
- Those that are less than 60,000 years old.
- It is composed of organic materials like wood or leather.
ہلکی توانائی کے استعمال سے کلوروفیل میں اے ٹی پی کی ترکیب _____ کہلاتی ہے؟
- Photorespiration
- Photolysis of water
- Photophosphorylation
- None of these
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Explanation
Photophosphorylation is the process in which ATP is synthesized using light energy during photosynthesis.It occurs in the thylakoid membranes of chloroplasts.It can be cyclic or non-cyclic.
اسٹیج جس میں پلازما جھلی سیل کی دیوار سے الگ ہونے لگتی ہے اسے _____ کہا جاتا ہے؟
- Deplasmolysis
- Plasmolysis
- Incipient plasmolysis
- None of these
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Explanation
Plasmolysis occurs when a plant cell loses water due to osmosis.It causing the plasma membrane to shrink away from the cell wall.It happens in hypertonic solutions where the external solute concentration is higher than inside the cell.
ڈی این اے انو کی شکل ______ ہے؟
- Crescent-shaped
- Spiral
- Double helix
- None of these
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Explanation
DNA has a double helix structure.DNA was discovered by Watson and Crick in 1953.It consists of two strands wound around each other, held together by hydrogen bonds between base pairs.
مییوسس میں عبور کرنا ______ میں ہوتا ہے؟
- Diakinesis
- Pachytene
- Zygotene
- None of these
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Explanation
Crossing over occurs in the pachytene stage of Prophase I in meiosis, where homologous chromosomes exchange genetic material.This process increases genetic variation in offspring.
