What geological evidence could there be for the presence of an early ocean?

Volcanic degassing of volatiles, including water vapour, occurred during the early stages of crustal formation and gave rise to the atmosphere. When the surface of Earth had cooled to below 100 °C (212 °F), the hot water vapour in the atmosphere would have condensed to form the early oceans.

Explanation:

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

the answer is b.) hydrogen bonds between bases.