The feedback loops communicate with the body to ensure homeostasis.
Answer is A. Feedback Loops 
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I think tracheae which is B not sure tho
        
                    
             
        
        
        
Answer: B the spider's web glittered in the morning dew.
Explanation:'s shows possesion
 
        
             
        
        
        
Answer:
Electrons Can Donate - 0
Electrons Can Receive- 2
Valence  - 2
Explanation:
The electronic configuration of oxygen is  . Thus in the p-orbital there is deficiency of two electrons. Hence, it can receive/share electron but it cannot donate electrons. This makes oxygen as a good electron acceptor. Since there is a deficiency of two electrons in the outermost shell of oxygen, the valence of oxygen in thus -2
. Thus in the p-orbital there is deficiency of two electrons. Hence, it can receive/share electron but it cannot donate electrons. This makes oxygen as a good electron acceptor. Since there is a deficiency of two electrons in the outermost shell of oxygen, the valence of oxygen in thus -2
 
        
             
        
        
        
Bacteria reproduce by Binary Fission (also known as "Budding"), a simple process in which many prokatyoric organisms reproduce; it involves cell division after the replication of the nucleoid.