1. Nerve roots merge into 31 bilaterally symmetric pairs of spinal nerves. 2. The key is crescent shaped, and roughly bilaterally symmetric . 3. Echinoderm larvae, like chordates, are bilaterally symmetric . 4. "Spriggina " fossils represent the first known organisms with a bilaterally symmetric body plan. 5. The flowers are tubular and bilaterally symmetric , with a narrow upper lip and a wider lower lip. 6. For an arbitrary shape, the axiality of the shape measures how close it is to being bilaterally symmetric . 7. This sample consists of a mixture of centric ( radially symmetric ) and pennate ( bilaterally symmetric ) diatoms. 8. Flowers in some families of flowering plants, such as the figwort family, are bilaterally symmetric ( zygomorphic ). 9. Bilaterally symmetric defects are seen in the periaqueductal grey matter, brain stem, basal ganglia, and dentate nucleus.10. Some species within the cnidarian class Anthozoa are bilaterally symmetric ( For example, " Nematostella vectensis " ).
