Answer:
A
Explanation:
The light from the sun is blocked by the moon, causing the earth to appear dark during the day.
 
        
                    
             
        
        
        
D. Producers provide primary consumers with the chemical energy
they need
 
        
             
        
        
        
The early change that the system makes in an effort to cope with an obstruction is that the stretch receptors in the bladder wall become hypersensitive. Urinary tract obstruction is a blockage that inhibits the flow of urine through the urinary tract, including the kidneys, ureters, bladder, and urethra. The blockage mat be partial or complete. In response to the obstruction the urinary system is capable of undergoing adaptive changes or responses to compensate for the obstruction.
        
             
        
        
        
Answer: 
You have 20% of adenine. If you have 20% of adenine than you have 20% of thymine, because the amount of adenine and thymine is equal. 20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%. Then divide this by 2 and you will get 30%. 30% of guanine and 30% of cytosine, because their amounts are equal in the DNA stand.
Explanation:
 
        
             
        
        
        
Yes. Plants use chemical energy to eat and gain energy. Animals mostly get energy from sleeping, and eating