چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب موٹا ہو جاے گا
He ought to have arrived ______ this time.
We can also use preposition by for time.
Here by this time means اس وقت تک
He will arrive by tomorrow, she will join by April etc.
AGM 22.01.2023
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The basic physical and functional unit of heredity is called
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.
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RY24012023
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The rate of decomposition of plants and animals is found in which of the following habitats?
Decomposition rates are much higher in coastal forests.
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RY24012023
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The study of heat changes in chemical reactions is called :
Thermochemistry is the study of chemical reactions and the energy changes that involve heat.
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RY24012023
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The burning of substances in air or oxygen on heating, with the release of a large amount of heat energy and light energy, is called combustion
while
In conduction, heat transfer occurs between objects by direct contact.
In convection, the heat transfer takes within the fluid
Condensation is the process by which water vapor in the air is changed into liquid water; it's the opposite of evaporation
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ND22-1-2023
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RY24012023
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Convex lenses are also known as :
Convex lenses are also known as converging lenses since the rays converge after falling on the convex lens
. The concave lens are known as diverging lenses, as the rays diverge after falling on the concave lens.
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RY24012023
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The light sensitive part of eye is
Retina: The retina is the light-sensitive tissue at the back of the eye.
The retina converts light into electrical impulses that are sent to the brain through the optic nerve.
Vitreous gel: The vitreous gel is a transparent, colorless mass that fills the rear two-thirds of the eyeball, between the lens and the retina.
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RY24012023
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Solar panels contain Solar Cell which are called
When light shines on a photovoltaic (PV) cell – also called a solar cell – that light may be reflected, absorbed, or pass right through the cell. The PV cell is composed of semiconductor material; the “semi” means that it can conduct electricity better than an insulator but not as well as a good conductor like a metal.
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RY24012023
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Who used telescope first time in the human history to observe Jupiter Saturn and Venus?
When Galileo pointed his telescope at Jupiter, the largest planet in our solar system, he made a startling discovery.
The planet had four "stars" surrounding it.
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RY24012023
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