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?
Answers
The ideal parasite is the one who does not kill its host because death of its host will lead to the death of parasite itself. If the parasite can thrive on its host without causing damage to the host then it is against the Nature’s law and is commensalism rather parasitism and nature has different mechanisms to check and balance the populations of all species so if the organism is parasite and is going to get nutrition from the host specie that is not possible without affecting host physiology. Hence it does not lead to any such evolution.
HLO MATE HERE IS UR ANSWER.
⭐. Yes. It may be possible that an ideal parasite should be able to thrive with in the host without harming it.
⭐. The success of an ideal parasite may not simply depend upon adaptiveness of the parasite in host.
⭐. The adaptiveness of the host is relatively to that ideal parasite may be not allowing that ideal parasite to continuous generations.
⭐. The changing adaptiveness of hosts is different generations may be an obstacke for tge adaptiveness parasite.