Answer:
There are two types of cell membranes. Either open or closed. Open is when other particles can get in or out. Closed is the opposite. 
I hope that helps!
 
        
             
        
        
        
Are sponges jointed not jointed or nothing 
Sponge are are nothing
        
             
        
        
        
Answer:
Is that earth is the only planet with water and an atomoushpere that allows us to breath in 
Explanation:
 
        
             
        
        
        
It's important because we need the scientists to discover where it is. the lokiarchaeota is a main cause for infections, and diseases, and if we identify it, and study it, we may know how to cure certain diseases, and how to prevent them.
        
             
        
        
        
They both eat zooplankton I think