Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%
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Ответ:
20%
Explanation:
Ответ:
The Hawaiian Islands were formed by volcanic activity. The Hawaiian Emperor seamount chain is a well-known example of a large seamount and island chain created by hot-spot volcanism. Each island or submerged seamount in the chain is successively older toward the northwest.
Explanation: