BIOL 313 Lecture Notes - Lecture 26: Remora, Olfactory Nerve, Whitefly
29 Mar 2018
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Document Summary
At least one species is always benefitting from the interaction, but the evolutionary response of the other species varies. One species benefits, the other remains unaffected. One species benefits, the other is affected (harmed) A parasite spends all or part of its life cycle in or on another organism (host), which suffers some reduction in probability of survival and/or fertility. Correlated life history between parasite and host. Typically exhibit extreme specializations that allow for successful development in host, therefore parasites are specific to one host. Due to parasite(cid:1685)s specializations, see an evolutionary arm(cid:1685)s race (red queen hypothesis), resulting in coevolution. Complete their life cycle in their host. Don(cid:1685)t complete their life cycle in their host. Can be found on hair or feathers of the host. Mechanism of attaching (persisting within) to hosts for long periods of time. Animals have immune system (fight off foreign body) Plants mount chemical defence against parasites.
