Well, historical events is a broad subject, but there are specific events that could contribute to how we value and think about the environment. for example, events as broad as wars or as specific as the gulf of mexico oil spill contributes to the way we treat our environment. and, as a society, we know about global warming and pollution, and if we analyze mistakes we made in our past through events, it could be possible that it benefits our relationship and care for the environment in the future.
        
             
        
        
        
Answer:  Energy released in the electron transport chain is captured as a proton gradient, which powers production of ATP by a membrane protein called ATP synthase.
Explanation:
 
        
                    
             
        
        
        
They are both involuntary
        
             
        
        
        
Answer: 400 Micro-grams
Explanation:
   The institute of the medicine, suggest all the women who are pregnant should consume atleast 400 micro-gram per day. In year 1998, this institute take the responsibility to recommend all the pregnant women about their diet plans. 
 They recommended to take 40 micro gram per day of the synthetic folic from the supplements and fortified food. The folic acid is the type of synthetic vitamin B. The women should consume the food from, the varied diets as it helps to prevent the brain of the baby and also from birth defects. 
 
  
 
        
             
        
        
        
Answer:
Both plant and animal cells have a nucleus and chloroplast where protein synthesis takes place.