Practice PPSC General Knowledge questions with answers and explanations.
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Erosion removes and transports soil or rock.
Water, wind, ice, and gravity can cause it.
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Specialized cells in the pancreas produce insulin.
Insulin helps regulate blood glucose.
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Force is measured in newtons in the SI system.
The unit is named after Isaac Newton.
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Plants use carbon dioxide and water to make glucose during photosynthesis.
Oxygen is released as a by-product.
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The joule is the SI unit of energy and work.
It is named after James Prescott Joule.
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Chlorophyll absorbs light energy for photosynthesis.
It gives most plant leaves their green color.
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Mitochondria produce much of the cell's usable energy as ATP.
They are therefore called the powerhouse of the cell.
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Roots anchor the plant and absorb water and minerals.
Root hairs increase the absorbing surface.
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Transpiration is the loss of water vapor through plant surfaces.
Most of it occurs through leaf stomata.
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Nitrogen makes up about 78% of Earth's atmosphere.
Oxygen is the second-most abundant gas.
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Most atmospheric ozone is concentrated in the stratosphere.
It absorbs much of the Sun's harmful ultraviolet radiation.
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A water molecule contains two hydrogen atoms and one oxygen atom.
Its formula is H₂O.
