Can accumulate over generations so that descendants are very different <span>from their ancestors
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Answer:
A
Explanation:
A because the introns are edited then linked together by nucleotides
The main function of the respiratory system is to allow the exchange of gases between the atmosphere and the lungs.
Hence,the only structure that carries out this function is the alveoli as other structures such as the nose,trachea and pharynx transport gases to the alveoli just so that it can can out its function.
Crystalloids are aquous solution of mineral salts or other water soluble molecules
colloids contains larger insoluble molecules such as blood and gelatin.
hope it helps u....
A more clear understanding of the world around us.
