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Define the terms (a) Pedogenesis (b) Ph...

Define the terms (a) Pedogenesis (b) Phototaxis

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Pedogenesis is the process of formation of soil (embryonic soil ) from the rock materials by weathering .
Phototaxis refers to the movement of organism in response to light , either towards light source (positive phototaxis ) as in Moths or away from light (negative phototaxis ) as in Earthworm .
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