A first possibility is geographic isolation, as is observed nowadays.
Iowa added "transgender" as a third possibility in its required gender section, plus an optional question: "Do you identify with the L.G.B.T.Q.
Despite the difficult beginning (the search was far from over, as a second possibility was plenty flat but too high), Laman and Hoskin's three-day expedition proved a smashing success.
Dr. Forrest of the Rochester group suggested as a third possibility that the star was surrounded by a faint nebula of dust and gas that had misled astronomers into thinking they had seen a planetary body.
As a third possibility, ExMVs-producing cell lines could be enriched for mRNA and regulatory miRNA species that, after horizontal transfer to the damaged tissues, promote regeneration by inhibiting apoptosis and promoting angiogenesis (Fig. 2c).
As a second possibility accounting for this discrepancy, the postcard intervention may have a different effect on various 'suicidal' behaviours.
As a third possibility, it could also be that a constitutive association between Hat1p/Hat2p and ORC occurs only at a subset of origins not examined in this study.
As a third possibility, PE can be produced from actively retrieved extracellular ethanolamine, which is cytidine 5'-diphosphate-activated and then coupled to diacylglycerol to generate PE.
It suggests a non-protein-mediated functional role e.g. in nuclear organization or as a second possibility the conservation of the generating mechanism and a near neutrality of the SSRs and the resulting HAARs.
As a second possibility, if he doesn't happen to have the requested card in front of him, he might want to respond by rejecting the request ("sorry, no", "I am terribly sorry but I do not have it").
