49:5.3 1. Adjustment to planetary environment. There are three general groups of inhabited worlds from the standpoint of the adjustment of creature life to the planetary environment: the normal adjustment group, the radical adjustment group, and the experimental group. | 49:5.3 1. Adjustment to planetary environment. There are three general groups of inhabited worlds from the standpoint of the adjustment of creature life to the planetary environment: the normal adjustment group, the radical adjustment group, and the experimental group. |