42.1k views
5 votes
Explain why the emergence of alga was required before animals could exist on the planet

User SatanTime
by
7.7k points

1 Answer

6 votes
Because the sun was a deadly laser. The ozone layer didn't exist yet, so the sun produced too much radiation for life above the water to possible. 
User Gowsikan
by
8.5k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.