Which best describes embryonic stem cells?
a.) they are capable of self-renewal only.
b.) they are capable of differentiation only.
c.) they are capable of self-renewal and limited differentiation.
d.) they are capable of self-renewal and unlimited differentiation.

D.) They are capable of self-renewal and unlimited differentiation.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."