SPSC 25 YEARS PAST PAPERS 2001 TO 2026
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
اعصابی غدود کیا مرکزی اخراج کا عضو ______ میں پایا جاتا ہے؟
- Amphioxus
- Balanoglossus
- Herdmania
- None of these
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Explanation
The neural gland is the main excretory organ in Herdmania, a type of tunicate (urochordate).It helps in osmoregulation and excretion by filtering waste from the body fluids.
کسی فرد کے سیل میں ڈی این اے کی زیادہ مقدار سے پتہ چلتا ہے کہ یہ _______ ہے؟
- Highly evolved organism
- Primitive organism
- Lower organism
- None of these
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Explanation
A greater amount of DNA in a cell of an individual typically indicates a highly evolved organism.
Complex organisms tend to have larger genomes with more genes, resulting in a larger amount of DNA compared to simpler organisms.
اینڈوپلاسمک ریٹیکولم میں _______ کی کمی ہے؟
- Ova
- Bacteria
- Embryonic cells
- None of these
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Explanation
Bacteria lack endoplasmic reticulum because they are prokaryotic and do not have membrane-bound organelles.In contrast, eukaryotic cells, including ova and embryonic cells, contain endoplasmic reticulum for protein and lipid synthesis.
انسانی استعمال کے لئے ایک نیم دیسی امینو ایسڈ ______ ہے؟
- Leucine
- Arginine
- Valine
- None of these
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Explanation
Arginine is a semi-indispensable (conditionally essential) amino acid.It means the body synthesizes it but may require dietary intake in certain conditions.It plays a crucial role in protein synthesis, immune function, and nitric oxide production.
انسان کی سانس لینے کی شرح سب سے کم ہے جبکہ ______؟
- Delivering
- Eating
- Resting
- None of these
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Explanation
The breathing rate of a person is lowest while resting because the body's oxygen demand is minimal.During rest, metabolic activity decreases, reducing the need for rapid respiration.
اسکیرس میں غیر معمولی اعضاء _______ ہیں؟
- Flame cell
- Renette cell
- Malpighian tubules
- None of these
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Explanation
Renette cells are the excretory organs in Ascaris, helping in waste elimination.These specialized glandular cells regulate osmoregulation and excretion in nematodes.
فرٹلائجیشن کا رجحان سب سے پہلے ______ کے ذریعہ سمجھا گیا تھا؟
- Hertwig
- Weismann
- Leeuwenhoek
- None of these
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Explanation
Hertwig was the first to observe and describe the process of fertilization in sea urchins.He demonstrated the fusion of sperm and egg nuclei, confirming the role of the nucleus in inheritance.
بالغ نطفہ ______ میں محفوظ ہیں؟
- Seminiferous tubules
- Vas deferens
- Epididymis
- None of these
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Explanation
Mature sperm are stored in the epididymis, where they gain motility and are kept until ejaculation.The epididymis is a coiled tube located at the back of the testes, connecting to the vas deferens.
کون سا اسفنج کا لاروا نہیں ہے؟
- Planula
- Amphiblastula
- Stomogastrula
- None of these
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Explanation
Planula is not a larva of sponges.It is the larval stage of cnidarians like jellyfish and corals.Sponge larvae include Amphiblastula and Stomogastrula, which develop into adult sponges.
- Omnivorous
- Herbivorous
- Carnivorous
- None of these
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Explanation
Cockroaches are omnivorous.It means they eat both plant and animal matter.They can consume a wide variety of organic materials, including food scraps, paper, and decaying matter.
