There are 6 elements that are the most important. The acronym, CHNOPS, is an easy way to remember these.
C - Carbon
H - Hydrogen
N - Nitrogen
O - Oxygen
P - Phosphorous 
S - Sulfur
        
             
        
        
        
Answer:
A heard of cattle
Explanation:
A heard of cattle is most like a community, because they stick together and are in a large group. A population, so happens to be almost exactly like a community except for a few differences
 
        
             
        
        
        
This process helps the necessary areas in the body to get the nutrients the blood carries. this is the curculatory system included with the other systems that creates a type of substance or nutrient the body needs.
        
             
        
        
        
Answer:
The answer is <em><u>GLUCOSE</u></em>.
Explanation:
This is the process which is common in both aerobic and anaerobic respiration.
 
        
             
        
        
        
Answer:
Oxygen, air, oxygen from the air, oxygen from air and the second part is synthesis
Explanation:
Got it on edge