Answer:
(all cells) Sum of all the chemical reactions that take place in the body, consisting of anabolism and catabolism.
Explanation:
 
        
             
        
        
        
the intercourse of a human or animal to make babies
 
        
             
        
        
        
<span>A rainforest is an example of a community. A community refers
to the interaction of various species within a common geographic location.
Communities are also known as biological communities, where species interact
and co-exist with another to thrive and survive their given environment. </span>
 
        
                    
             
        
        
        
Answer:
Why are molecules such as valinomycin effective at transporting ions across the membrane?
Valinomycin is effective as transporting ions across the membrane because it is no charged, so it can carry ions.
Why would a drop in temperature to or below the transition temperature limit valinomycin mediated K+ transport across the plasma membrane?
Valinomycin is limited by temperature because its activity is highly sensitive and it depends on a stable and an average temperature.
Explanation:
Valinomycin is effective at transporting ion across the membrane because is an antibiotic that alternates hydroxy and amino acid, ans it helps membranes to be permeable. Valinomycin is a cyclic molecule that helps in ions transportation through membranes. Also, antibiotics have a temperature range of activity, that's why it is sensitive to changes. 
 
        
             
        
        
        
Oxygen is the answer for this question.