Answer:
blood alcohol concentration 
Explanation:
we studied that recently so I could recall
 
        
             
        
        
        
Answer:
Some of the hydrogen bonds with other elements, but most of it remains free hydrogen. Both hydrogen and helium are light elements, so they will tend to evaporate into space over time. ... But the gravity of Earth isn't strong enough, so Earth's early atmosphere of helium and free hydrogen evaporated into space.
Explanation:
 
        
                    
             
        
        
        
Answer:
Genes lying close to each other on chromosome
Explanation:
When genes lie close to each other on chromosome,  they are inherited together as an intact unit in meiosis cell division and such genes are termed as linked genes.During meiosis the genetic material (allele/genes) is exchanged between the homologous parent chromosome which causes  chromosome recombination and thus the formation of linkages These genes have high chances of recombination as they lie close to each other. 
 
        
             
        
        
        
Answer:
A cell is in a hypertonic solution, the solution has a lower water concentration than the cell cytosol, and water moves out of the cell until both solutions are isotonic. Cells placed in a hypotonic solution will take in water across their membranes until both the external solution and the cytosol are isotonic.
 
        
             
        
        
        
Secondary succession is the infer kind of succession that will take place on an abandoned, unpaved country road.
Secondary succession is termed as one of the two types of ecological succession in the life of a plant.
It is a process which is being started by an event for example harvesting, hurricane, and forest fire. which reduces an established ecosystem. Secondary succession occurs in a pre-existing soil and it is the ecological succession that occurs after the initial succession which has been disrupted and some animals and plants still exist.