Which part of the human reproductive system helps the embryo get its nutrition from the mother's blood?
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A unit of power is called a
In a concave mirror when the object is placed at infinity which of the following applies to the image?
Which of the following has the same unit as energy?
Two identical resistors of 20 ohm each are connected in parallel. This combination, in turn, is connected to a 10 ohm resister. The equivalent resistance of the combination will be
___ is known as a disease mostly caused by occupational health hazards.
____ is the process in which acids and bases react to form salts and water.
An element has an atomic weight of W and an atomic number of N. The number of protons in the nucleus of its atom is
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