An isotope of any element is the same, with a variation in the neutrons of the nucleus.
The mass number change but the atomic number doesn't.
In this case, protium, deuterium, and tritium are all hydrogen isotopes.
Protium is 1H or Hydrogen-1 is without neutrons.
Deuterium is 2H  or Hydrogen-2 has one neutron.
Tritium is 3H or Hydrogen-3 has two neutrons.
 
        
             
        
        
        
A GWAS can be performed by actually genotyping as few as 300000 to 1million
        
             
        
        
        
<span>Pyrolobus fumarii belongs to the kingdom of archaebacteria that is a thermophile which thrives at very high temperatures as much as 113 C. </span>It was  first discovered in 1997 in a hydrothermal vent where the temperature is as high as that. It belongs to the p<span><span>hylum Crenarchaeota, c</span><span>lass Thermoprotei, </span><span>Order Desulfurococcales and </span><span>Family <span>Pyrodictiaceae. Answer is B. </span></span></span>
 
        
        
        
The answer to this is passive hyperemia.
        
             
        
        
        
Answer:
A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass.
Explanation: A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.