Even if people's taste for coffee does not depend directly on the weather, as Sims pointed out coffee buyers know that weather is variable and may stock up when adverse weather variations arise.
As new helpful variations arise, they are also selected for and are layered on top of or replace previously successful variations.
Now that we know how "spontaneous" variations arise, it is time to recognize that we cannot have selection without variation by natural genetic engineering and epigenetic modifications.
Unfortunately, current entropy measures are mostly unable to quantify the complexity of any underlying structure in the series, as well as determine if the variation arises from a random process [11].
That is, does variation arise in subsequent passages of an isolate and, if so, can phylogenetic analysis overcome the potentially misleading background noise associated with this level of sensitivity?
Novelty and variation arise from these interactions.
Finally, if sex ratio variation arose due to variation in maternal condition, we would predict that all mothers in the sample were in good condition, and no difference in sex ratio between the groups would be predicted.
If however, such variation arises due to either stochastic errors or environmental influences acting after development of the villus tree structure, there may not be a significant intra-site correlation.
The parametric bootstrap assumes the observed data arose from sampling this fitted model, and considers the variation arising if other data had been sampled from that same model.
In addition, it represents a check to ensure that the observed variant does not represent an alternative form of variation, for instance if the repeat was overlapping an alternatively spliced exon, or variation arising from sequence error.
After 8... b5, the popular, sharp Sveshnikov Variation arises.
