The phrase that best describe the word "energy" is letter "C. the ability to do work". The unit most commonly used to express energy is Joules (J) which is also derived from the equation of work which is the product of force and the distance that a body moves parallel to the force applied.
An atom of chlorine has several valence electrons in its
The different combination of alleles for two genes must be due to "Crossing Over" [ Process occurs after fertilization, inter-changing of characters ]
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Weather can differ and change with climate and can almost change suddenly. Erosion is wear from the surface or areas over time.
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Most mutations have no effect on an organism.
