Answer: D - all of the above
Explanation:
Cytosine (C) is paired with Guanine (G) according to the base pair rule just as Adenine (A) is paired with Thymine (T). 
The sugar in DNA is deoxyribose which is a modified form of ribose(also sugar). It simply is a ribose sugar which has lost an oxygen atom hence “deoxyribose”. Deoxyribose is one of the components that make up the DNA backbone.
Hydrogen bonds exist between bases. The importance of these hydrogen bonds is to hold the complementary strands of DNA together.
 
        
             
        
        
        
<span>The answer to this question would be: 
- The permanent thermocline presents a barrier that keeps nutrients in deeper water from mixing with surface waters.
- The sunlight penetrates deep into the tropical ocean, warming the surface waters and creating stratification of water masses.
In tropical lands, the area is getting sunlight all around the year. This will cause the plant to be able to do photosynthesis all around the year too. Sunlight can penetrate the ocean, but the intensity will be much lower in deeper part. The ocean also become warmer but it will become cold in the deeper part too. </span>
        
             
        
        
        
Answer:
Explanation:
Two Types of Cellular Processes . Cellular respiration can be aerobic (meaning "with oxygen") or anaerobic ("without oxygen"). Which route the cells take to create the ATP depends solely on whether or not there is enough oxygen present to undergo aerobic respiration.
 
        
             
        
        
        
Answer:
Is there and multiple choice options?
Explanation: