Changes

An [[organism]] possesses spherical symmetry if any cut through the organism's center produces a mirror-image on the other side. Many colonial algae (like Volvox) exhibit spherical symmetry. <ref>http://science.kennesaw.edu/biophys/biodiversity/animalia/symmetry.html</ref>

An [[organism]] possesses '''spherical symmetry''' if any cut through the organism's center produces a mirror-image on the other side. Many colonial [[algae]] (like Volvox) exhibit [[sphere|spherical]] symmetry. <ref>http://science.kennesaw.edu/biophys/biodiversity/animalia/symmetry.html</ref>