Answer:
D.
Explanation:
I think its D. sorry if its wrong
Embryonic stem cells can become all cell types of the body because they are pluripotent. Adult stem cells are thought to be limited to differentiating into different cell types of their tissue of origin. Embryonic stem cells can be grown relatively easily in culture.
The concentration of carbon dioxide in the atmosphere will decrease over time as it will be stored in the trees instead.