I believe the answer will be D.
Adding those organic materials back into the soil helps it become rich in nutrients that have been used in order to grow the plants to begin with.
I hope I was able to help. Best of luck!
        
                    
             
        
        
        
Maybe they looked through the telescope and saw that earth was actually revolving around the sun
        
             
        
        
        
If this is rude im sorry , but you need to soace it out kinda
        
             
        
        
        
Answer:
the answer is d
Explanation:
When we hear something, we are sensing the vibrations in the air. The number of vibrations per second is known as the frequency, measured in Hertz (1 Hz = 1 vibration per second).
 
        
                    
             
        
        
        
<u>Answer:  </u>
Four stages involved in cellular respiration does not function independently. Instead, they Dependent on each other.
<u>Explanation:</u>
Four stages in cellular respiration involves Glycolysis, link reaction, Kerbs cycle, electron transport chain.
Glycolysis is the initial stage in cellular respiration. In this stage, the glucose present in the cytoplasm is broken down into 2 molecules of Pyruvate.
The second stage is the link reaction or the bridge reaction. In this stage, the pyruvate produced in the first stage is pumped actively into the mitochondria. Now the pyruvate is converted into acetyl group by removing one molecule of  and two molecules of
 and two molecules of   . This acetyl group combines with CoA Enzyme to produce acetyl CoA.
. This acetyl group combines with CoA Enzyme to produce acetyl CoA.
In the Kerb’s Cycle, the Acetyl CoA combines with oxaloacetate to form a 6 carbon atom compound.
Now in the electron transport chain stage, the energy released by the electrons are used to pump the hydrogen that was removed in the previous stages.
Thus the by-product of one stage is used as the source in another stage. Hence the cellular respiration process is not independent.