What is the modern species of Acropora Hyacinthus (table corals)?

Which are reasons cells undergo cell division?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture