EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
پتوں کے خلا اور پتوں کے نشانات کس پودے کے رائزوم میں پائے جاتے ہیں؟
Pteris
Psilotum
Mars ilea
None of these
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Explanation
Pteris is a genus of ferns whose rhizome shows leaf traces and leaf gaps in its vascular system. A leaf trace is a vascular strand that extends from the stem or rhizome into a leaf . A leaf gap is a region of parenchymatous tissue in the vascular cylinder above the point where a leaf trace diverges . Last verified on 27-10-2026
نوجوان اسپورینجیم میں اسپور پیدا کرنے والے بافتوں کے گرد موجود غذائی بافت کو کیا کہتے ہیں؟
Sporocytes
Archesporium
Tapetum
None of these
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Explanation
Tapetum is the innermost layer of the sporangium wall and provides nourishment to developing spores and pollen grains . It supplies nutrients and materials needed for the development of microspores. Last verified on 27-10-2026
کارٹیکس کس سے نشوونما پاتا ہے؟
Pleurome
Dermatogens
Periblem
None of these
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Explanation
Periblem is the primary meristematic tissue that develops into the cortex of roots and stems .
Dermatogen develops into the epidermis, the outer protective layer of the plant. The traditional histogen theory identifies three primary meristems : dermatogen (epidermis), periblem (cortex), and plerome (stele or central vascular cylinder). Last verified on 27-10-2026
کس خاندان کے بیضہ دان میں صرف ایک بیضہ موجود ہوتا ہے؟
Solanaceae
Compositae
Labiatae
None of these
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Explanation
Compositae , also known as Asteraceae . It typically has an inferior, bicarpellary, syncarpous and unilocular ovary containing a single basal ovule. After fertilization, the ovule develops into a seed. The ovary develops into a dry, one-seeded fruit called a cypsela . Sunflower, marigold, and dandelion are common examples of plants belonging to the Asteraceae family. Last verified on 27-10-2026
درج ذیل میں سے کون سا طحلب سرخ مدّ کا سبب بنتا ہے؟
Cephaleuros
Gonyaulax
Polysiphonia nigriscene
None of these
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Explanation
Gonyaulax is a marine dinoflagellate commonly associated with red tides , which occur when certain microscopic algae multiply rapidly in seawater. Red tides can discolor seawater reddish -brown. It may release toxins that harm fish, shellfish, and other marine organisms . Last verified on 27-10-2026
کروموسوم سے باہر موجود موروثی عوامل کو کیا کہا جاتا ہے؟
Plasmids
Plastids
Ribo-somes
None of these
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Explanation
Plasmids are small, usually circular DNA molecules found mainly in bacteria , separate from the bacterial chromosome . They replicate independently and may carry genes that provide advantages , such as antibiotic resistance . Last verified on 27-10-2026
کس پودے میں اسپوروجونیم سے تخمک صرف گیمیٹوفائٹ کے گلنے سڑنے سے خارج ہوتے ہیں؟
Funaria
Marchantia
Riccia
None of these
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Explanation
Riccia is a simple liverwort belonging to the bryophytes . Its sporophyte is highly reduced and consists mainly of a capsule embedded in the gametophyte. In Riccia , the capsule lacks a well-developed seta and elaters . The spores are released when the surrounding gametophytic tissue decays . Last verified on 27-10-2026
ایکویسیٹم کے تنے میں پروٹوزائلم ٹریکیڈز کے ٹوٹنے سے بننے والی گہا کو کیا کہتے ہیں؟
Air chamber
Carinal canal
Central cavity
None of these
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Explanation
The carinal canal forms due to the disintegration of protoxylem elements in the stem of Equisetum (horsetail). It is located within each vascular bundle , beneath the ridge of the stem. The vallecular canals are different cavities located beneath the grooves of the stem. They are associated with the cortex . Last verified on 27-10-2026
سلور فِش کس گروہ میں شامل ہے؟
Fishes
Amphibian
Arthropods
None of these
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Explanation
Silverfish is a small, wingless insect belonging to the phylum Arthropoda and class Insecta . It has a flattened, elongated body covered with silvery scales and three tail-like appendages . Last verified on 27-10-2026
ایسی سیل لائن تیار کرنے کی تکنیک کیا کہلاتی ہے جس کے خلیات میں مطلوبہ جینز کی یکساں نقول موجود ہوں؟
Gene therapy
Gene cloning
Both A and B
None of these
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Explanation
Gene cloning is a technique used to produce multiple identical copies of a specific gene or DNA sequence. The cloned gene can be introduced into host cells, which multiply and produce copies of the desired DNA . Last verified on 27-10-2026
