I feel like this question has more to do with water and its changes of states more than just freezing water. Water has a high specific heat, which means that it takes more energy to either boil or freeze than many other types of substances. This is unusual about water because it has a low molecular weight, which is normally associated with a smaller need for energy to change states. Is water didn't require this extra energy, then it water would freeze much more easily. This would be detrimental for many biological ecosystems. Think about how the world would be if water froze at say 60 degrees F, rather than 32. This would significantly effect the world as we know it.
As soon as the white blood cells detect an unknown cell (the pathogen) they produce antibodies or they engulf them, i dont know if this will help but I hope this does :)
Answer: Abiotic factor for polar: Ice
Abiotic for desert: Sand
Biotic for polar: Polar bears
Biotic for desert: Cacti
The types of factors are different because there are different set conditions for each ecosystem. A cactus is built for it's hot, dry ecosystem. If it were to move to a polar ecosystem it would not survive there. Same for the polar bear. It's built for polar regions. It has white fur to blend with the white ice to help it blend in and it's adapted to swim to get it's food source.
Explanation:
awnser is high concentrations of oxygen
