The difference between ideal and reciprocal altruism is in one, the person expects nothing in return. In reciprocal altruism, the person expects something back at some point.

No; because altruism is behavior that incurred a cost to the actor and benefits the recipient. This can be reciprocal; for example I will cook dinner for you (here there is a cost to me and a benefit to you) if you walk my dog for me (here there is a cost to you and a benefit to me).

Altruism involves selflessly helping others without expecting anything in return. This behavior can be motivated by empathy, compassion, or a sense of duty. Evolutionary theories suggest that altruism can also benefit the individual indirectly through reciprocity or kin selection.

Natural selection may favor altruism when the benefits of helping others outweigh the costs to the individual. This can occur in situations where individuals are closely related, as in kin selection, or in reciprocal altruism, where individuals help others with the expectation of receiving help in return. Overall, altruism is more likely to be favored in social species where cooperation and group cohesion enhance the survival and reproduction of individuals.

Yes, altruism can evolve through natural selection when it provides benefits to the survival and reproduction of individuals who share the same genes. This can occur through kin selection, reciprocal altruism, or group selection, where behaviors that benefit others increase the inclusive fitness of individuals over time.