Answer:
C.
Explanation:
The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. 
 
        
             
        
        
        
She was unconscious before the incident so something must have happened before it, also the bruise could result in brain damage.
        
             
        
        
        
Answer:
Effective food supply was most likely an effect on society that resulted from improvements in blood handling during World War I and World War II.
Explanation:
 
        
             
        
        
        
Structure. A hypha consists of one or more cells surrounded by a tubular cell wall. In most fungi, hyphae are divided into cells by internal cross-walls called "septa" (singular septum). Septa are usually perforated by pores large enough for ribosomes, mitochondria and sometimes nuclei to flow between cells.