It is impossible to tell how long P vivax has been around.
But the fossil record tells us that insects have been around and aplenty for at least 350 million years, since the carboniforous period, when the first reptiles appeared. The earliest known mosquito (from the fossil record) is known to be around 90 million years old, and it has the mouthparts to have fed just like today's mosquitoes (think jurassic park, mosquitoes in amber are fossils).
This would place the mosquito right in the Mesozoic era, in the cretaceous period, which means this mosquito probably fed off dinosaurs or perhaps a small mammal.
Who's to say that the P vivax - Culicidae relationship was not established already by that time and dinosaurs (or some other animal back then) didn't get malaria? If the parasite, vector and host were all there, there's a chance that their life cycle has remained unafected for millions of years.
(and i'm thinking they were, oportunistic bugs like P vivax hardly ever change their ways unless they absolutely have to)
Cheers.
2006-07-04 03:00:21
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answer #1
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answered by flammable 5
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Quite simply plasmodium falciparum and other malaria causing bacteria evolved after the evolution of the anopheles mosquitoes who evolved after humans.
Many evolutions occur as random gene mutations in response to environmental condition as a direct response to the realisation of a niche, in other words the place where an organism can live and get everything it requires in minimum or better quantities. For instance, homo sapiens evolved from a prehistoric reptile known as a placoderm. Think about what caused this evolutionary change and why?
2006-07-08 09:17:37
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answer #2
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answered by Libby 3
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each Plasmodium species coevolved with their mosquito host species - you see that this is quite -specific relationship. If you traveled in different malaric regions you would need different profylactics depending on the species of Plasmodium, not any mosquito can host any Plasmodium. so it is specific adaptation over VERY long time.
The name of the mosquito is Anopheles actually, and sure it can feed on many animals, not only humans, who told you otherwise? So humans are not indispensable for them.
so you dont think that new species evolve at present time - so then do you think they are created newly or that they have been just hiding very well somewhere since the seventh day? pls tell me
2006-07-04 07:40:25
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answer #3
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answered by iva 4
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Clearly it did not exist in its present state, it has evolved to take advantage of the relationship between humans and mosquitoes. It's kind of embarassing really, an arthropod and a vertebrate being played for chumps by a microscopic parasite.
2006-07-04 04:57:44
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answer #4
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answered by Anonymous
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it really is an consumer-friendly one. If the international receives too warm, we've shown that we may be able to live to inform the tale it because the "Cradles of Civilization" were in warm, dry elements. If the international receives chilly, then we've already shown that we may be able to face up to ice a at the same time as, and that is with none "intense" technologies. If the international receives overpopulated, it really is going to, out of necessity, stability itself out. i don't believe of we settle on to stress about surviving the subsequent one hundred years. the genuine question is a thanks to we keep the subsequent one hundred years from turning out to be the subsequent darkish Age.
2016-11-05 21:08:12
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answer #5
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answered by ? 4
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Because they need blood, and that came from anything that moved be it dinosaur or caveman
2006-07-04 06:35:37
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answer #6
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answered by Miss Prim 2
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