Covalent bond is when two atoms share one or more pairs of electrons, an example of this could be H20 or C02. 
ionic bonds are when one or more electrons from am atom are removed and attached to another, which can result in positive or negative ions which attract each other, an example of this could be table salt.
        
                    
             
        
        
        
Answer:
Fossil fuels are produced by the same geological processes.
Explanation:
Fossil fuels form when organic matter which has been buried in the Earth over a long period of time is subjected to heat and pressure over a long period of time. Heat and pressure are both critical components for the formation of a fossil fuel. The process of the formation of fossil fuel is the same today as it was in the past. The geological processes are the same for the formation of fossils. 
 
        
             
        
        
        
Bones and skull is the answer
        
             
        
        
        
Answer: sponges are the cleaners of the water around the corals , coral feeders , and healers in a sens 
Explanation:
 
        
             
        
        
        
<span>The bacteria are probably eubacteria because they live on common plant leaves.
</span>Archaebacteria living in extreme places(like the thermophile bacteria that in a volcano) while eubacteria lives in normal places. L<span>eaves of common houseplants is not an extreme location, so </span>Archaebacteria is less likely found there<span>. </span>Both <span>eubacteria and archaebacteria could be autotroph or heterotroph, so the information cannot be used to conclude anything.
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