Answer:
oxygen because 
Explanation:
because u  can survive 3 days with out it  and if u did not have oxygen u would suffocate
 
        
                    
             
        
        
        
<h3><u>Answer;</u></h3>
Myxedematous coma
<h3><u>Explanation;</u></h3>
- Myxedema coma is a severe hypothyroidism leading to decreased mental status, hypothermia, and other symptoms related to slowing of function in multiple organs.
- it is a loss of brain function as a result of severe, longstanding low level of thyroid hormone in the blood.
- It is a rare life threatening complication of hypothyroidism.
 
        
        
        
Answer: Keeping those genes locally in the mitochondria gives the cell a way to individually control mitochondria,” Johnston says, because pivotal proteins are created in the mitochondria themselves. ... Other structures in our cells could also benefit from this type of local control.
 
        
             
        
        
        
Answer:
 the biosphere
Explanation:
The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
 
        
             
        
        
        
Sickle cells can damage your spleen, the organ that helps fight germs as part of your immune system. That can make you more likely to get pneumonia and other infections.