EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
کوئلے کے ذخائر کے لیے کاربونیفیرس دور کب تھا؟
- 50 mya
- 500 mya
- 2000 mya
- 300 mya
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Carboniferous period of coal deposition was mainly took place around 300 million years ago.
- The Carboniferous period is known for extensive coal formation.
- It occurred during the late Paleozoic Era.
Last verified on 04-06-2026
ڈروسوفیلا میں جنس کے تعین کے پیچیدہ طریقہ کار کی وضاحت کے لیے پیش کردہ نظریہ کون سا ہے؟
- Linage theory
- Genetic balance theory
- Mosaics theory
- Classical theory
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Explanation
- The genetic balance theory explains sex determination in Drosophila.
- It was proposed to explain the ratio of X chromosomes to autosomes.
- Sex is determined by the balance between X chromosomes and autosomal genes.
- It helps explain male and female development in fruit flies.
Last verified on 04-06-2026
جے شکل گروتھ کَرْو درج ذیل میں سے کن چیزوں سے وابستہ ہوتا ہے؟
- Exponential growth
- Biotic potential
- Unlimited resources
- All of these
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Explanation
- A J-shaped growth curve represents exponential population growth.
- It occurs when resources are unlimited.
- Organisms reproduce at their biotic potential.
- Growth continues rapidly without environmental resistance.
Last verified on 04-06-2026
شہتوت کے سلک کیڑا ______ ہے؟
- Anthraea mylitta
- Bombyx mori
- Attacus atlas
- None of these
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Explanation
- Bombyx mori, which is the scientific name for the Mulberry silkworm.
- This species is widely cultivated for its silk production.
- It is often referred to as the "Domesticated silkworm" or simply "Silkworm".
Last verified on 04-06-2026
- Acidic
- Alkaline
- Variable
- Neutral
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Explanation
- Blood in humans is slightly alkaline in nature.
- Its normal pH ranges from 7.35 to 7.45.
- This balance is important for proper body functions.
- Even small changes in pH can affect health.
Last verified on 04-06-2026
وہ فلیمینٹس جو خلیے کے اندر آرگنیلز کو حرکت دینے میں مہارت رکھتے ہیں، کون سے ہیں؟
- Microfilaments
- Intermediate filaments
- Actin
- Microtubules
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Explanation
- Microtubules are cytoskeletal filaments responsible for movement inside cells.
- They help in transporting organelles within the cell.
- They also play a key role in cell division.
- They act as “tracks” for intracellular movement.
Last verified on 04-06-2026
مندرجہ ذیل میں سے کون سا جوڑا درست مطابقت نہیں رکھتا؟
- Coral snake
- Glass snake
- Sea snake
- Rattle snake
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Explanation
- Glass snake is actually not a true snake.
- It is a legless lizard that resembles a snake.
- Coral snake → True snake
- Sea snake → True snake
- Rattlesnake → True snake
Last verified on 04-06-2026
سب سے پہلے فروٹ فلائی میں ایکس رے شعاعوں کے ذریعے میوٹیشنز کس نے پیدا کیں؟
- De Vries
- H.J.Muller
- Morgan
- Bateson
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Explanation
- H. J. Muller was the first scientist to induce mutations using X-rays in fruit flies (Drosophila).
- His groundbreaking experiments were conducted in 1927.
- He demonstrated that X-rays can cause genetic changes (mutations).
- This discovery greatly advanced the field of genetics.
Last verified on 04-06-2026
جب خلیات مخصوص بن جاتے ہیں تو وہ کیا کرتے ہیں؟
- Develop similarly
- Transcribe different genes
- Contain different genes
- None of these
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Explanation
- Cell specialization (differentiation) occurs when cells perform specific functions.
- Specialized cells have the same DNA but use different genes.
- Different genes are turned on or off according to the cell's role.
- This process allows the formation of tissues and organs.
Last verified on 04-06-2026
خواتین کے جسمانی خلیات کے انٹرفیز نیوکلیئس میں پائی جانے والی گہرے رنگ کی جسمانی ساخت کو کیا کہتے ہیں؟
- Fission
- Barr body
- Centriole
- Centromere
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Explanation
- A Barr body is a densely staining structure found in the nuclei of female somatic cells.
- It represents an inactive X chromosome.
- It is visible during the interphase stage of the cell cycle.
- It helps in dosage compensation between males and females.
Last verified on 04-06-2026
