They train our immune system so it's ready when our bodies are attacked, and they aid in digestion and supply us with vitamins. ... Scientists and doctors can even utilize prokaryotes to help the human body.
        
             
        
        
        
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ANSWER:</h2>
1) Back word     2) 2197 kg
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EXPLANATION:</h2>
recoil (regularly called knock back, kickback or basically kick) is the retrogressive development of a firearm when it is released. so when the cannon is fired  the bullet will move forward and the cannon will move backward
The power of gravity on the moon is 1.6m/s2. Along these lines, the mass of a protest that weight is 21,532, the mass of that question on the moon will be 2197 kg.
 
        
        
        
Answer:
Increase occur in skin diseases and decrease occurs in the Earth's average temperature.
Explanation:
If both Carbon Dioxide and Ozone levels began to decrease, increase occur in skin diseases and decrease occurs in the Earth's average temperature. The decrease in ozone levels allows more UV radiation to reach the Earth's surface which lead to various diseases such as skin cancer, cataracts, and weakened immune systems. The atmospheric carbondioxide gas is responsible for the increase of surface temperature by trapping reflected solar radiations so decrease in carbondioxide concentration will leads to lower surface temperature.
 
        
             
        
        
        
D. To identify any differences between the control group and the
experimental group