please answer these 4 questions ? Question 6 1 pts Kellogg (1896) and Fahrenholz
ID: 261842 • Letter: P
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please answer these 4 questions ?
Question 6 1 pts Kellogg (1896) and Fahrenholz (1909) both hypothesized that phylogenies of parasites and hosts often change in parallel. Why do we expect that? When populations of a host species become geographically isolated from one another, the parasite populations have to adapt to new hosts, and this usually leads to speciation in the parasite as it adapts When geographically isolated, both species experience divergence leading to a reduction in parasite load in the former host species as it becomes less habitable to the parasite When populations of a host species become geographically isolated from one another, the parasite populations that the host carries also become geographically isolated, leading to potential divergence of both species When populations of a parasite species become geographically isolated from one another, divergence results in speciation of the parasite species with subsequent colonization of new host species DQuestion 7 1 pts Lice are often obligate parasites on specific hosts and because of such close associations, they are often used in studies of species interaction and coevolution. One such example involves lice on pigeons and doves, where phylogenetic studies uncovered eight cospeciation events. What drove their coevolution in this host-parasite system? When speciation changes the size of their natural host, lice may opt to live on a new host, which is a different size than their original host. After a speciation event occurs in a pigeon or dove, lice are constrained to remain on their host species because they often fare poorly when switching hosts. Studies have proposed that there are benefits to lice if they stay on size-matched species, with small lice living on large host species and larger lice on small host species After speciation of the host, lice often switch to smaller hosts to maintain the size match that enables them to avoid preening by the host.Explanation / Answer
Q 6. When populations of a host species become geographically isolated from one another, the parasite populations that the host carries also become geographically isolated, leading to potential divergence of both the species.
Q7. As in the given data, the lice are host specific, when the speciation changes the size of their natural host, lice may opt to live on a new host, which is in different size than their original host.
Q8. diffuse coevolution. In diffuse coevolution, all different species of organisms interact with all other different species of organisms leading to different changes.
Q9.The cultural part of transmission occurs only when their sons learn song from the father. The gene part is a result of females mating only with males who sing the song typically produced by the males of their own species, greatly reduing between species-mating.
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