JAMB - Biology (2005 - No. 5)

Hydra exhibits radial symmetry, meaning its body can be divided into two equal halves along any plane passing through a central axis. This type of symmetry is characterized by body parts arranged around a central axis, like spokes on a wheel.  Hydra, a cnidarian (like jellyfish and sea anemones), has a simple, tubular body with tentacles surrounding the mouth, a feature typical of radially symmetrical organisms.