Covalent bond is when two atoms share one or more pairs of electrons, an example of this could be H20 or C02.
ionic bonds are when one or more electrons from am atom are removed and attached to another, which can result in positive or negative ions which attract each other, an example of this could be table salt.
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Crossing Over and Independent assortment
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plays the role in skeletal muscle movement
White blood cells use "legs" to grab ahold of the blood vessel walls to inch their way forward.
