Answer:
Between ph7 and ph 11
Explanation:
The optimum pH level for this is at pH7 because the number achieved was 350 product molecules per Minute
 
        
             
        
        
        
Answer: asked the patient two questions about feelings of hopelessness and feelings related to the enjoyment of activities
Explanation:
Hopelessness is an emotional context featured by a lack of hope, passion, and optism. It is expressed as a symptom of varying behavioral and mental health problems, including depression, bipolar, anxiety, eating disorders and among others.
In the other hand, the test on feelings related to enjoyment was done to evaluate the the emotions of pleasure from the individual’s engagements.
However, the physician carried out the two tests on his patient to know whether he's depressed or not. 
 
        
             
        
        
        
Answer:
By exercising, it increases blood flow towards the muscles and digestive tract. This can help move food through the stomach, or digestive tract.  
 
        
             
        
        
        
Answer:
Without an oxygen atmosphere very few things could live on the early Earth. Anaerobic bacteria were probably the first living things on Earth. The early Earth had no oceans and was frequently hit with meteorites and asteroids.
Explanation: