Major trends in the evolution of animals include

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All of these trends are major evolutionary developments in animals. Cephalization and the development of a definite head region allowed for the development of specialized sensory organs and improved efficiency in movement and feeding. The development of different types of symmetry, including radial and bilateral symmetry, also improved efficiency in movement and feeding. Variation in coelomic cavities allowed for the evolution of more complex organ systems, while segmentation provided greater flexibility and improved overall coordination of movement.

Major Trends in the Evolution of Animals Include