LECTURER BOTANY PAST PAPERS AND SYLLABUS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
نائٹروجن آکسائڈس ، سلفر آکسائڈ اور کاربن آکسائڈ کا بنیادی ذریعہ کیا ہے؟
Photochemical reactions in the atmosphere
Industrial process
Burning fossil fuels at high temperatures
None of these
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Explanation
Burning fossil fuels (coal, oil, and gas) at high temperatures releases nitrogen oxides (NOx), sulfur oxides (SOx), and carbon oxides (COx) into the atmosphere. These gases contribute to air pollution, acid rain, and climate change.
اسپیروجیرا _____ رکھنے میں ماس-پروٹونیما سے مختلف ہے؟
Pyrenoids
Discoloid chloroplasts
Rhizoidal branches
None of these
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Explanation
Spirogyra has pyrenoids , which are structures in its chloroplasts that store starch and aid in photosynthesis. Moss protonema lacks pyrenoids ; instead, it has a filamentous structure that helps in the early growth stage of moss.
پیرو آکسیٹیل نائٹریٹ (پین) ______ کا ایک پروڈکٹ ہے؟
London smog
Photochemical smog
Sulphurous smog
None of these
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Explanation
Peroxyacetyl nitrate (PAN) is a toxic pollutant formed in photochemical smog due to reactions involving hydrocarbons and nitrogen oxides in sunlight. It is a strong eye and respiratory irritant. It is commonly found in urban areas with heavy vehicle emissions.
تیزاب کی بارش کی اصطلاح کس نے تیار کی؟
Christ Ralph
Elmer Joseph Clark
Robert Angus Smith
None of these
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Explanation
Robert Angus Smith coined the term "acid rain" in 1852 while studying air pollution in Manchester, England . He was a Scottish chemist known for his research on the effects of industrial emissions on the environment.
کیلے کا پلانٹ ______ سے تیار ہوتا ہے؟
Sucker
Bud
Seed
None of these
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Explanation
Banana plants propagate through suckers . They are shoots growing from the underground rhizome. They do not produce viable seeds, as commercial banana varieties are mostly sterile.
اینٹومو فیلس پھول ______ ہیں؟
Large colored and scented flower
Very large in size
Colorless flower
None of these
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Explanation
Entomophilous flowers are pollinated by insects and attract them using bright colors and strong fragrances. Examples include sunflower, rose, and jasmine , which rely on insects like bees and butterflies for pollination.
Well developed roots
Well developed stomata
Well developed aerenchyma
None of these
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Explanation
Aerenchyma is a specialized tissue in aquatic plants that contains large air spaces to help in buoyancy and gas exchange. It is commonly found in plants like water hyacinth and lotus to facilitate survival in aquatic environments.
کون سا فلوروسینس کمپوزیٹی سے تعلق رکھتا ہے؟
Capitulum
Spadix
Umbel
None of these
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Explanation
Capitulum is the characteristic inflorescence of the family Compositae (Asteraceae) , seen in sunflowers and daisies. It consists of a dense cluster of small florets arranged on a common receptacle.
پیاز کا پتی لیس تنے جس کو پھول برداشت کرنے کے لئے تیار کیا جاتا ہے اسے ______ کہا جاتا ہے؟
Peduncle
Scape
Rachis
None of these
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Explanation
Scape is a leafless flower-bearing stem that arises from the ground in plants like onions and lilies . It helps elevate the flower above the leaves for better pollination.
بغیر کسی بے ہودہ انڈے سے برانن کی تشکیل ______ کہلاتی ہے؟
Amphimixis
Parthenogenesis
Parthenocarpy
None of these
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Explanation
Parthenogenesis is the development of an embryo from an unfertilized egg. It commonly seen in some plants, insects, and reptiles. Parthenocarpy refers to the formation of fruit without fertilization, resulting in seedless fruits.
