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Evolution by natural selection arises when these three properties are present in a system
Heredity - offspring resemble their parents in discrete characteristics.
Variat...
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...
23 - 20.5
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...
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