How is cephalisation considered as an asset in an adjustment with the environment?
The animals having bilateral symmetry move with their anterior end forward. This has led to cephalisation, i.e., differentiation of a definite head at the anterior end. Cephalisation involves the * concentration of nervous tissue (brain) and sense organs in the head. This arrangement is an asset in an adjustment with the environment, as the anterior end of a moving animal is the first to encounter changes in the area it is entering.