Solution: Morphological structures are structures that are visible to our eyes. Molecular structures are biomolecules that are essential parts of living organisms. We are surrounded by a lot of diversity. Because of the variation in morphological structures, this diversity is feasible. This demonstrates that the least stable structures are morphological structures. On the earth, life began as rudimentary forms and has evolved into many sophisticated forms.

Although life has developed over millions of years, the structure of essential macromolecules like DNA has not changed. The DNA of a human and a mouse is identical. A protein in a bird and a fungus has the same structure.  So, after all these years, the chemical underpinning of life has remained unchanged. This demonstrates that molecular structure has showed better stability in evolution than morphological structure.