Answer:  "iris" .
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Answer:
Mitochondria 
Explanation:
Aerobic respiration has most of the characteristic of eukaryotic cells. So, when they have enough oxygen it happens within the mitochondria.
 
        
             
        
        
        
Answer:
Photosynthesis is a process by which phototrophs convert light energy into chemical energy, which is later used to fuel cellular activities. The chemical energy is stored in the form of sugars, which are created from water and carbon dioxide.
Explanation:
hii jiju
 
        
                    
             
        
        
        
James Watson and Francis Crick proposed the model of DNA. 
<h3><u>Explanation</u>:</h3>
The DNA is defined as the genetic information storing molecule of the cell. This molecule was proposed to have different shapes and sizes according to other scientists. But this model is still date accepted because of its enormous proofs and experimental successes. 
The model consists of 2 sugar phosphate backbone composed of alternate units of phosphate and deoxyribose sugar. They have the nitrogen base attached to the inner side of the backbone and these nitrogen bases are attached with the complementary nitrogenous base by means of 2 or 3 hydrogen bonds. 
 
        
             
        
        
        
Answer:
according to me may be option number b