Answer:
Double and triple covalent bonds are stronger than single covalent bonds and they are characterized by the sharing of four or six electrons between atoms, respectively.
Explanation:
 
        
             
        
        
        
Answer:
A is the answer i think because it has more reef
 
        
             
        
        
        
Answer:
well i only know that a male has 23 chromosomes and his hormones are called testosterone ,please follow me and his sex chromosome is <em><u>xy</u></em>
 
        
             
        
        
        
The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids.