The difference<span> between the </span>birth rate<span> and the death </span>rate<span> of a country or place is called the </span>natural increase<span>. </span>
Three of a predator's main weapons are sharp teeth, claws and jaws.
Salt molecules are much smaller than sugar molecules, so more of them will dissolve in water.
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E-cool is a bacterium that occurs naturally in the intestines of people and animals