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The spandrels originated as a nonadaptive side-consequence of a prior architectural decision.
2
The latter may be subdivided further into adaptive (selection) and nonadaptive factors.
3
Behavior is screaming forward, and it might be nonadaptive.
4
These stress-mediated maternal effects can have nonadaptive consequences for offspring when they find themselves alone with a predator.
5
In the second group of "insinuations," nonadaptive features may enter the exaptive pool by neutral drift.
6
Our findings suggest that many or even most bacterial asRNAs are nonadaptive by-products of the cell's transcription machinery.
7
The principal evolutionary mechanism in the origin of species must then be an essentially nonadaptive one (pp.
8
These originally nonadaptive spaces were then coopted (several centuries later, in this case) as "canvasses" for wonderfully appropriate designs.
9
The adaptationist program cannot provide a full accounting of evolutionary change if a high percentage of traits originated as nonadaptive spandrels.
10
But the effects then imposed upon organismal phenotypes must be designated as spandrels-thatis, as nonadaptive side consequences expressed at another level.
11
Is the umbilical brooding chamber a coopted spandrel- aspacethat arose as a nonadaptive, geometric byproduct of winding a tube around an axis?
12
I have, of course, and throughout this chapter, referred to such later utilization as exaptation-inthis case by the cooptation of initially nonadaptive spandrels.
13
I affirm the importance and high relative frequency of spandrels, and therefore of nonadaptive origin, in evolutionary theory by two major arguments for ubiquity.
14
Here, we used phylogenetic comparative methods to test distinct hypotheses corresponding to adaptive and nonadaptive evolutionary scenarios for the morphological evolution of sigmodontine rodents.
15
On the contrary, I am convinced that we still have no good idea about the relative frequencies of adaptive and nonadaptive effects in geographic variation.
16
Our observations are consistent with the hypothesis that gBGC is a nonadaptive consequence of a selective pressure to limit the mutation rate in mitotic cells.