12. Why are lobe-finned fish thought to be the closest relatives to tetrapods?
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Ответ:
Lobe-finned fish are thought to be the close relatives to tetrapods because of the fact that the fins are very flexible and potentially useful for supporting the body on land, as in lungfish and tetrapods.
Explanation:
Ответ:
Cross multiply:
5*? = 17.25*100
⇒ ? = 17.25*100/5= 345
345 lb of sea water will be needed in order to get 17.25 lb of salt~