The correct answer is the evolution of multicellular life. The evolution of multicellular was the most important event happened during the creation of the ozone layer. All of type of the organisms had evolved over time.
        
             
        
        
        
The excretory system is intended to remove any solid/fluid waste from your body, such as urine.
        
             
        
        
        
Answer:
cell grows, DNA replicates, cell prepares for mitosis, cell divides 
 
        
             
        
        
        
Answer:
It is Isotonic to the fish egg solution
Explanation:
It is Isotonic because Isotonic is a solution that has the same solute concentration with another solution I.e the amount of solute in one solution is the same with the other. This slow the free flow of solutes in equal part through the semipermeable membrane from one solution to the other.