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The damage of the human body due to radiation (X-rays or grays etc,) is measured in:
The strongest force in nature is
Which among the following is the most common media of pollination in flowers without petals?
Which of the following metals is used in spacecraft to tolerate high temperatures?
A convex lens and concave lens each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power (in dioptres) of the combination is :
Consider the following organisms 1. Agaricus 2. Nostoc 3. Spirogyra Which of the above is/ are used as biofertiliser/biofertilisers?
In a chemically pure state, diamonds are
Ozone layer above earth’s atmosphere will
The danger signals are red while the eye is more sensitive to yellow because
The substance used to attract the gypsy moth is
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