GENERAL SCIENCE CLASS 10 MCQS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
الہام میں ______ شامل ہے؟
Contraction of intercostals muscles
Contraction of diaphragm
Inward movement of ribs
Both a and b
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Explanation
Inspiration, or inhalation, involves the contraction of two main muscle groups:
Diaphragm : a dome-shaped muscle that separates the chest cavity from the abdominal cavity.
When it contracts, it flattens and increases the volume of the chest cavity.
Intercostal muscles : muscles located between the ribs.
When they contract, they pull the ribs outward and upward, increasing the volume of the chest cavity.
سانس کی سطح مندرجہ ذیل خاصیت رکھتی ہے؟
Thin and wet
Permeable
Very large
All of these
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Explanation
A respiratory surface, such as the alveoli in lungs or the surface of gills, possesses the following properties :
Thin : allows for efficient gas exchange Wet : facilitates the exchange of gases between the surface and the surrounding environment Permeable : allows gases to pass through the surface Very large : provides a large surface area for gas exchange to occur
ہر سٹوما ______ سے بنتا ہے؟
One guard cell
Two guards cells
Three guard cells
Four guard cells
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Explanation
Each stoma (singular of stomata) is formed by two guard cells , which are specialized cells that surround the stoma and control its opening and closing.
The guard cells swell or shrink to adjust the aperture of the stoma , regulating gas exchange and transpiration in plants.
پودے ______ کے ذریعے گیسوں کا تبادلہ کرتے ہیں؟
Roots
Stomata
Stem
All of these
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Explanation
Plants exchange gases through:
Roots : absorb oxygen and release carbon dioxide through small openings called root hairs Stomata (singular: stoma): tiny openings on leaf surfaces that allow for gas exchange (CO2 in, O2 out) Stem : some plants have aerial roots or stem cuticles that allow for gas exchange
حیاتیاتی افعال جو گیسوں کا تبادلہ کرتے ہیں؟
Photosynthesis
Respiration
Both a and b
Growth
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Explanation
Gaseous exchange refers to the exchange of gases between an organism and its environment.
Both photosynthesis and respiration involve gaseous exchange:
Photosynthesis : takes in carbon dioxide (CO2) and releases oxygen (O2) Respiration : takes in oxygen (O2) and releases carbon dioxide (CO2)
ایک ہی نوع سے تعلق رکھنے والے جانداروں کے مقامی گروپ کو ____ کہا جاتا ہے؟
Biosphere
Community
Ecosystem
Population
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Explanation
A population is a localized group of organisms that belong to the same species and live in a specific geographic area.It is a unit of evolution , and its members share a common gene pool.