Answer: because you think a letter was easiest way to represent the elements. Another way is to use the chemical symbols and it is to allow you to write chemical formulas easily.
Explanation:
<span>continental rise... honest answer
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if I remember correctly I'm pretty sure all cells have a nucleus
In the vacuum of space there is no molecules. Sound waves get to your ears by bouncing off of molecules in the air. No molecules in space's vacuum means sound waves have nothing to bounce of off so they can not reach our ears meaning we hear no sound.
<span>The correct answer is B. their kidneys can't excrete concentrated salt. Since salt is dissolved in water, the organism sends its water reserves to the kidneys to dissolve and excrete the salt but this leads to dehydration. That's why people at sea who don't know what they're doing often dehydrate themselves by drinking sea water, thinking that they're safe.</span>
