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
        
             
        
        
        
Answer:
Healthy food, exercise and use of sunglasses.
Explanation:
Safety goals for tina's decreased vision is to eat a balanced and healthy diet rich in antioxidants and vitamin A, Get enough sleep, doing regular exercise, Wear sunglasses in order to protect your eyes from the sun, Wear eye protection in order to protect the eyes from injury. these practices work because there effectiveness are scientifically proven. 
 
        
             
        
        
        
Explanation:
1. Using bits and pieces of other sources and passing it off as one’s own work 
Patchwork plagiarism 
In patchwork plagiarism, an author uses bits from other people's works and pass it off as their own. 
2. Passing off another person’s work as one’s own 
Plagiarism
The act of passing off another person's work as one's own is called plagiarism. It is a very serious offence
3. Passing off the entire work of another person as one’s own 
Global plagiarism
Global plagiarism is the complete passing off of another person's own. 
4. When most of the work is one’s own, but uncited sources are used
Incremental plagiarism
Here an author fails to cite the sources where he/she obtains information from. 
Learn more: 
Plagiarism brainly.com/question/2623994
#learnwithBrainly
 
        
             
        
        
        
Answer:
(A): DNA and protein
(B): The case for proteins appeared stronger until the 1940s, especially since biochemists had identified them as a class of macromolecules with great heterogeneity and function specificity, essential requirements for the hereditary material. Moreover, little was known about nucleic acids, the physical and chemical properties of which seemed far too uniform to account for the multitude of specific hereditary traits of each organism
(C): Virulent strains are pathogenic (causing disease), whereas non-virulent strains are non-pathogenic (harmless) strains.
 
        
             
        
        
        
Answer:
 It is the arrangement of nucleotide within the genes which differs among DNA structures of different species. Each gene contains several codons which is three nucleotide long