What are potential therapies of embryonic stem cells ?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution

What could happen if two base pairs on a strand of dna or switched