<span>When grains move closer together, eliminating spaces between them, _____ has occurred? </span>compacation
Diffusion<span> in </span>cells<span>. Materials like oxygen, carbon dioxide and glucose enter and </span>leave cells by diffusion<span>. When a </span>cell<span> is respiring the concentration of oxygen and glucose inside the </span>cell<span> is lower than the surrounding blood so these </span>substances<span> move into the </span>cell<span>.
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Every std has stages of atleast 3
If a doctor suspects that one of her patients has a deficiency in one of the six key elements found in living organisms, she should prescribe calcium supplements. Calcium is crucial to bone growth and health.
