The amino acid sequence of their cytochrome C reveals common ancestry among many different species of organisms. Option A is the right choice.
While all organisms share the ability to synthesize hemoglobin (B), the percentage of body weight that is fat (C) or the percentage of body surface used for gas exchange (D) are not reliable indicators of common ancestry. These traits can evolve independently and vary widely across species, even those that are closely related.
In contrast, the amino acid sequence of cytochrome C (A) provides a powerful evidence for shared ancestry. This molecule is essential for cellular respiration and is highly conserved across diverse species.
This high degree of conservation suggests that Cytochrome C has undergone minimal change since its origin in a common ancestor, indicating a shared evolutionary history for many different species.
Therefore, the amino acid sequence of cytochrome C is the most compelling evidence for common ancestry among many different species of organisms. Option A is the right choice.
Question:-
Which of the following reveals common ancestry among many different species of organisms?
A The amino acid sequence of their cytochrome C
B Their ability to synthesize hemoglobin
C The percentage of their body weight that is fat
D The percentage of their body surface that is used in gas exchange
E The mechanism of their mode of locomotion