I believe that it consists of about 3 billion letters/base pairs
A hypersensitive reaction to a specific antigen in the environment is a(n) _ALLERGY_.
Sebaceous glands shrink in size :) hope that's you out
There are many fuels that produce energy. Some are:
- Coal
- Nuclear Energy
- BioFuel
- Oil / Gas
Hope this helps!
They group together for warmth when it's cold and they also group together in case of threats.