Answer:
I intentally had an incorrect answer the right answer is subjective in case anyone needs it not bias its subjective. Explanation:
 
        
                    
             
        
        
        
Answer:
Option 3, of the abiotic factors found in their environment
Explanation:
The abiotic factors such as absence of sunlight and extremely cold temperature represents picture of an extreme habitat under an ice shelf in Antarctica.  
The optimum temperature requirements of bacteria for its survival ranges from 10oC to 20oC. In case,  if a bacteria lives in an environment where temperature is less than -5oC or higher than  50oC, then such habitats are considered to be “habitats with extremities”  as special physiological mechanisms are required to maintain the homeostasis and survive.
Likewise absence of sunlight further adds to the extremities of the habitat.
 Option 3, is correct
 
        
             
        
        
        
Answer:
Centrioles is only found in animal cells
 
        
                    
             
        
        
        
Answer:
The nitrogenous bases in DNA are adenine (A), guanine (G), thymine (T), and cytosine (C).
Explanation:
 
        
                    
             
        
        
        
Huygens was writing about the theory of light.