Chloroplasts and mitochondria are organelles found in plant cells. Chloroplasts contains the cholrophylls while the mitochondria is the powerhouse of the cell where energy is found. In this case, the two organelles not only have inner membranes but also their own DNA and ribosomes
        
             
        
        
        
Smooth ER<span>, by contrast, is not associated with </span>ribosomes<span>, and its </span>functions<span> differ. The </span>smooth ER<span> is involved in the synthesis of lipids, including cholesterol and phospholipids, which are used in the production of </span>new<span> cellular membrane.</span>
        
             
        
        
        
Answer:
The answer is D/ The allelic frequency for pointed ears is 0.5 (50%).
Explanation:
I got it right on my Exam
 
        
             
        
        
        
Depends on what mountain you are on 
If you are on Everest, then the amount of effective oxygen available would be 6.9% (0 altitude would be 20.9) 
that is why anyone should always bring oxygen tanks when climbing a high mountain