The benthic organism is an organism that lives on, in or near the seafloor. This also helps the environment and marine life by providing structure, alter water currents, and stabilize shorelines, hard substrate settlement. Some recycle nutrients and improve water quality. An animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes. 
 
        
                    
             
        
        
        
Answer:
higher altitudes have a lower level of oxygen which in turn, trains your lungs to hold and breathe more oxygen which also helps you cycle, run, etc. longer than usual
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Answer:
a gene is a unit of DNA that is usually located on a chromosome, they carry information that determine the traits, traits are characteristics inherited from your parents. 
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There are 75% chances that their offsprings will be checkered.
Explanation:
The gene version allele is received by an individual and if they are different then the gene of the parent which is dominating is expressed in the offspring. However, in the case of co dominance the offspring gets the trait of both parent alleles. 
So, in this case the mating of checkered rooster and checkered hen with co-dominance in their trait of genes will produce checkered offspring with a chance of 75 percent as can be calculated by the punnet square. The result will be 3 out of 4 checkered offspring.