What is the source of embroys used for embryonic stem cell research?

surface modification is a versatile tool and has been widely used in material science and engineering that has significantly facilitated the study and characterization of complex materials. at  matexcel, experienced experts in surface science can offer tailored efforts to meet the specific needs from our clients.

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"