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(B) Similarities in proteins and genes performing a given function among diverse organisms provide clues to common ancestry.These biochemical similari

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Towards common ancestry

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(B) Similarities in proteins and genes performing a given function among diverse organisms provide clues to common ancestry.These biochemical similarities point to the same shared ancestry as structural similarities observed among diverse organisms.For example,$Trypsin$ (an ancient enzyme) is present in organisms ranging from protozoa to mammals,indicating evolutionary conservation.

When we talk of functional macromolecules (e.g.,proteins as enzymes,hormones,receptors,antibodies,etc.),towards what are they evolving?

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