Question

Why evolution has exhibited a greater stability of molecular structure when compared with morphological structures?

• A. Basic biomolecules like DNA, RNA, carbohydrates, proteins, etc., exhibit remarkable similarity in all organisms
• B. Basic biomolecules like DNA, RNA, carbohydrates, proteins, etc., do not exhibit remarkable similarity in all organisms
• C. Basic biomolecules like DNA, carbohydrates exhibit remarkable similarity in all organisms whereas proteins and RNA do not exhibit similarity at all
• D. None of the above

Answer 1

The correct option is A Basic biomolecules like DNA, RNA, carbohydrates, proteins, etc., exhibit remarkable similarity in all organisms

Evolution's progressive trend seems to be more and more complex in body designs emerged over time, e.g., immense diversity and increasing complexity are seen in body size, form and structure from non-chordates to chordates.

But at the molecular level, these diverse type of organisms exhibit unbelievable similarity. For example- the chemical composition of DNA is basically same in all living organisms except for differences in the sequence of nitrogenous bases. Other biomolecules like RNA, proteins, etc, also show remarkable similarity in all organisms.

Thus, it shows that evolution has exhibited a greater stability of molecular structure as compared to morphological structures.

So, the correct answer is option A.