Answer:
a. By Calculating magnetic reversals.
Explanation:
They determine the age of the ocean floor by examining magnetic fields in the planet Earth.
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Adolescent means the development of a child into an adult
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Answer:
Explanation:
All Cnidarians have appendages with stinging cells in their tips which are utilized to capture and stifle prey. In truth, the phylum title "Cnidarian" actually implies "stinging animal." The stinging cells are called cnidocytes and contain a structure called a nematocyst. The nematocyst could be a coiled thread-like stinger.