Population ecology is the study of these and other questions about what factors affect population and how and why a population changes over time. Population ecology has its deepest historic roots, and its richest development, in the study of population growth, regulation, and dynamics, or demography.
While running, the neck of a giraffe moves backward and forward to keep the animal balanced. Giraffes have a top speed of about 56 kilometres per hour (35 miles per hour), however, because its legs are so long a galloping giraffe does not appear to be going very fast.
Standing involves a series of relatively immobile positions separated by brief intervals of movement during which swaying occurs. When a subject is in the easy standing position, few muscles of the back and lower limbs are active during the immobile periods.here is also a slight side-to-side movement. The basic movements involved in walking are (1) flexion and extension at the hip, knee, and ankle joints and at the front part of the foot; (2) abduction and adduction, chiefly at the hip joint (fig.