PPSC PAST PAPERS ALL MCQS 2021 OF EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
مندرجہ ذیل میں سے کون سا دو مرکزوں پر مشتمل ہے؟
- Paramecium
- Plasmodium
- Monocytes
- None of these
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Explanation
Paramecium contains two nuclei: a large macronucleus for everyday cell functions and a smaller micronucleus for reproductive processes.
This unique feature supports its cellular activities and genetic functions.
- Equatorial
- ICTZ
- Doldrums
- None of these
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Explanation
The area 5 degrees north to 5 degrees south of the Equator is known as the Doldrums.
This region experiences calm winds and low pressure, where the trade winds converge.
It often causing minimal wind activity.
پہاڑوں کے خاتمے کے لیے کتنے فصد برف باری ضروری ہے؟
- 36 - 38 degree
- 30 - 34 degree
- 38 - 40 degree
- None of these
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Explanation
When outside temperatures are low and there is moisture in the air, small ice crystals are formed.
On their own they are tiny, but when they collide they stick to each other and make snowflakes.
When lots of these particles join together they get heavier and once they are heavy enough they fall to the ground as snow.
ہوا کی عمودی حرکت جو اس قوت کو استعمال کرتی ہے اسے _______ کہا جاتا ہے؟
- Differential pressure
- Absolute pressure
- Atmospheric pressure
- Acceleration
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Explanation
The vertical movement of air is called air current.
Temperature differences can cause air currents because warmer air is less dense than cooler air, causing the warmer air to appear 'lighter'.
Air currents can be caused by differences in temperature, pressure, or impurity concentration.
دماغ میں اسامانیتاوں کا پتہ لگانے والا ٹیسٹ _____ کہلاتا ہے؟
- ECG
- EEG
- MRI
- None of these
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Explanation
An EEG (Electroencephalogram) is a test that measures electrical activity in the brain.
It helps detect abnormalities such as seizures, sleep disorders, and other neurological issues.
ایٹم کا غیر چارج شدہ ذرہ ___ ہے؟
- Electron
- Neutron
- Proton
- None of these
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Explanation
Neutrons have no electric charge, hence they are neutral.
Protons have a positive charge.
Electrons have a negative charge.
ماحول پر خیالی افقی لکیر جو مساوی فضا کے دباؤ کی نمائندگی کرتی ہے؟
- Isobar
- Isotope
- Isotone
- None of these
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Explanation
An isobar is an imaginary line that connects places of equal barometric pressure.
They can be used to find areas of low or high pressure over a large area.
- Panipat
- Polyps
- Kerala
- None of these
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Explanation
A polyp is a projecting growth of tissue from a surface in the body, usually a mucous membrane.
Polyps can develop in the: colon and rectum (ear canal).
جان لوگی بیرڈ ______ کی ایجاد کے لیے جانا جاتا ہے؟
- Radio
- Laptop
- Mobile Phone
- Television
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Explanation
John Logie Baird, a Scottish inventor, is best known for inventing the world's first working television system in the 1920s.
He revolutionizing communication and entertainment.
وہ کونسا سیارہ ہے جو زمین سے آسانی سے نظر آتا ہے؟
- Venus
- Mercury
- Mars
- Jupitar
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Explanation
There are now four visible planets in the sunrise direction: Venus (brightest); fainter Mars and Saturn; and Jupiter (bright and lowest in the sky).