It's controversial because the best source of stem cells is a human embryo (an aborted fetus).
Forest fires promote regrowth, clear cut has to be replaced
The brain which, along with the spinal cord gathers informationand responds to changes in the environment.
Answer
the root bio means life, so he living element
Explanation:
the words “biogeochemical cycle” can be easily broken down. “Bio-” is the biotic system, “geo-” is the geological component, and “chemical” is the elements which are moved through a “cycle
