Which of the following conclusions can be made based on the observed fact that stem cells can differentiate into any kind of cel
l in the human body A. all cells can mutate into different forms when exposed to external conditions B. Dna contains all the instructions necessary to build every kind of cell C. Stem cells can only differentiate into specialized cells when exposed to internal conditions. D. none of these
Animals needs oxygen's to survive and plants need carbon dioxide to survive. The ozone layer reflects harmful UV rays from the sun to protect the things living on Earth.
