Biological Constructionism, or Organisms as bricoleurs

"It is not that organisms find environments and either adapt themselves to the environments or die. They actually construct their environments out of bits and pieces. In this sense, the environment of organisms is coded in their DNA and we find ourselves in a kind of reverse Lamarckian position. Whereas Lamarck supposed that changes in the external world would cause changes in the internal structures, we see that the reverse is true. An organism's genes, to the extent that they influence what the organism does in its behavior, physiology, and morphology, are at the same time helping to construct an environment." - R.C. Lewontin