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Evolution by Natural Selection

Why doesn't n...

Question

Why doesn't natural selection lead to the evolution of totally harmless parasites?

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Solution

Natural selection did not lead to such evolution because if the parasite becomes harmless then they show commensalism, not parasitism.
With the help of natural selection, they evolve themselves to find other ways to infect host cells.
They cannot be totally harmless by evolution or by natural selection.

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Q. Why didn’t natural selection lead to the evolution of such totally harmless parasites?

Q. More vulnerable to predation by making it physically weak. Do you believe that an ideal parasite should be able to thrive within the host without harming it? Then why didn't natural selection lead to the evolution of such totally harmless parasites?

Q. Natural selection is a part of evolution of a species. The driving force that leads to evolution within a species is explained by

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Parasitism, Mutualism and Competition, all can lead to co-evolution of species.

Q. Regarding assertion and reason, select the right option.
Assertion [A]: Parasitism is almost similar to predation.
Reason [R]: Parasitism does not lead to the killing of an organism, but it does harm one of the organism that are involved in parasitic interaction.

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