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The reflex arc describes a sequence of events leading to an action that takes place rapidly in response to a stimulus without having to think about it i.e. without an impulse travelling to the brain for c...

Genetic modification involves the transfer of material from one species into another species. This involves using restriction enzymes, which recognise a particular DNA sequence to cut the DNA at this site...

23 - 2^0.5

Test Answer

Say arctan of x is equal to a value y. Now take the tangent of both sides; x now equals tan of y! Easy from here, differentiate both sides wrt x. Now 1 equals sec^2y dy/dx, and you can rearrange to find d...