Answer:
Cell Membrane---Semi-permeable
Explanation:
All cells have cell membranes, regardless of the type, and they are all semi-permeable, or selectively permeable, which means they can regulate what enters and leaves the cell.
 
        
             
        
        
        
A Peptide bond is formed between two molecules 
Example: when Carboxyl group and amino group form its releasing a water molecule. (H2O) well i hope this help i did my research c: 
        
                    
             
        
        
        
Answer:
when carbon dioxide level goes up.temp. goes down.and vice versa
 
        
             
        
        
        
I would say false because fossil fuels are formed by dead animal matter
        
             
        
        
        
Organs , fins is the correct answer