When we consider functional macromolecules (e | vedclass

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(B) Step $1$: Functional macromolecules like proteins perform specific biological roles across different species.Step $2$: Similarities in the amino a

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Towards common ancestry

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(B) Step $1$: Functional macromolecules like proteins perform specific biological roles across different species.Step $2$: Similarities in the amino acid sequences of these proteins (e.g., $Trypsin$ or $Cytochrome-c$) in organisms ranging from protozoa to mammals indicate that these molecules have been conserved throughout evolution.Step $3$: These biochemical similarities serve as evidence for common ancestry, suggesting that diverse organisms share a common evolutionary origin.Step $4$: Therefore, the correct answer is $(B)$.

When we consider functional macromolecules (e.g., proteins acting as enzymes, hormones, receptors, antibodies, etc.), what do their similarities across diverse organisms point towards?

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