Thr trees that the moths resided on had previusly been a light white/grey colour. However, there was so much pollution as a result of the Industrial Revolution that the soot darkened the trees to a dark grey/blackish colour. The white moths had a higher population prior ot the Revolution because they blended into the trees and predators would eat the dark moths.
But, once the trees became stained a darker colour, the light coloured moths were no longer able to blend into the trees DANGER! The above is a synopsis of Kettlewell's conclusions after his experiments with peppered moths in Great Britain during the 1950's. Later analysis has shown that Kettlewell's experiments were seriously flawed.
Kettlewell "proved" that birds ate peppered moths perched on tree trunks during daylight hours by introducing a large population of peppered moths in enclosures with trees and birds, then he showed that the birds ate more of the light colored moths off the dark colored trees. Unfortunately, in nature, peppered moths are nocturnal, they hide during daylight hours, flying and feeding only during darkness, they do not normally perch on tree trunks during daylight hours. Also, bird predation is a trivial factor in peppered moth evolution, the main predators of peppered moths are bats, which catch them in flight not resting on tree trunks.
Lastly, after tougher pollution laws took effect in the 1960's, and tree trunks became lighter again, Kettlewell did field observations which supposedly showed a rebound of light colored moths and the decimation of dark colored moths. While Kettlewell's original field notes have never been found, his observations do not comport with later and more scientific field studies. Bottom line - color camouflage and tree trunk color may have a tiny effect on light vs. dark moth populations but major shifts in moth coloration are dependant on other factors and whether there was actually a major shift in moth coloration (outside of Kettlewell's imagination) is open to question.
It is a spontaneous genetic mutation in the DNA of the moth. Complete Conversation:User: why does a black moth appear in a population of light coloured moths? Weegy: It is a spontaneous genetic mutation in the DNA of the moth.
Either you are asking this or your teacher is asking this in light of the "English Industrial Revolution story about the moths." If you did not read it, you should it will explain everything (and its very short; a few lines). In short, there were white moths and black moths that rested on the tree bark of the trees within England during the Industrial Revolution.
The black moths could be eaten by the birds because the trees were white and the white moths blended in. After all the black smoke that the factories put out, the trees turned black. So, the black moths blended in and the white moths were eaten.
Auto Answered|Score 1Weegy: ... webbing that the moths spin in the feed. The Indian meal moth ... reddish brown or black in color with a long snout. Tiny spots of red often appear ... flying when the light is ...ehow.com/list_5914852_bugs-live-bird-see... Answered|Score .4723Weegy: Why did the dark colored moths outnmber the light colored moth during the Industrial ... darker colour, the light coloured moths were ... on light vs. dark moth populations but ...wiki.answers.com/Q/Why_did_the_dark_colo... Answered|Score .4484Weegy: The black moths were more fit ... How does the history of the peppered moth illustrate an ... mass of peppered moths were light in colour and blended into the light coloured ...wiki.answers.com/Q/How_do_peppered_moths... Answered|Score .4427Weegy: How does the history of the peppered moth illustrate ... mass of peppered moths were light in colour and blended into the light coloured ... either white or black ash.
The moths ...http://wiki.answers.com/Q/How_does_the_history_of_the_peppered_moth_illustrate_an_example_of_natural_selectionAuto Answered|Score .4379Weegy: Where does the tiger moth live? What ... either white or black ash.
Too much is not good, if people get addicted with sex later on they will be allergic with it.
Without having any formal training on the matter, I would venture to say that its a respiratory issue, not an allergy. Especially if you are a smoker. Sex is a cardiovascular exercise for all intents and purposes.
Since sex tends to leave you out of breath (if it's good) it's easy to imagine it to be sufficient stress to trigger respiratory issues.
“Often patients with allergies are more sensitive to these irritants due to their baseline allergic disease," says Miller. And with more than 50 million Americans dealing with allergies, that's a lot of people at an increased risk for fragrance sensitivity. Combine that increased sensitivity with a constantly increasing level of irritating chemicals and fragrances that are ever-present in our environment and the things we use every day (over 5,000 types used today), and it's no surprise that fragrance sensitivities are more common than initially believed.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.