Question
How does the cork act as a protective tissue?
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The flash of a gun is seen by a man 3 seconds before the sound is heared. Calculate the distance of the gun from the man (Speed of sound in air is 332m/s).
Explain why, school bags are provided with wide straps to carry them.
Name the leucocytes that increase in number during worm infestations.
Give an example for production of transverse wave.
How many types of organisms are believed to be present on Earth?