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#harleydavidson #iron883 #ironman #sportster #evolutin #engine #할리했어오늘도 #할리데이비슨 #아이언 #괄괄삼 #bobber #기깔나네 #그가말했다 #평가하지마라 #너나잘하세요 . . . #유리나무 #포토모토데이 #photomotoday #photographer #yulinamu #RideOnPlanet https://www.instagram.com/p/CGEKjBGl8ft/?igshid=se2ibu8nwiz3
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#sufism What has to be...
Batesian Mimicry-hiding in plain site!
In 1847, 22 year old self taught entomologist Henry Walter Bates convinced Alfred Russell Wallace to allow him to follow on his trip to the Amazonian rainforest. Bates had no formal schooling but had already published a short paper on the beetles he had collected in the Charnwood Forest near his home in Leicester when he was only 18. The two arrived in Brazil in May, 1848 and began collecting and describing everything they saw. Four years later Wallace would return to England, but a ship fire en route would destroy much of his collection. Bates remained in Brazil and sent back over 14,000 specimens, of which over 8,000 were unknown to European science. When Bates finally did return to England in 1861, he gave a short paper to the Linnean Society of London on a phenomenon that he observed of mimicry, which was published a year later as 'Contributions to an Insect Fauna of the Amazon Valley'. This work would contain his theory on the evolutionary adapation of one species to resemble another species to derive the benefit of their adaptions against predation. Certain butterflies, he noted, contained poisons that made them unpalatable to birds and other predators, and other species adapted to resemble them to benefit from the others' adaptation, without the poison. We now call this type of mimicry Batesian Mimicry. The image is from Bates' published work with the Linnean Society, showing the resemblance between species, one unpalatable to its prey and the other not.
Happy Birthday, Henry Bates, born on this day 8 February 1825!
Image in the public domain from Henry Walter Bates 1862. Contributions to an insect fauna of the Amazon Valley. Lepidoptera: Heliconidae. Trans. Linn. Soc. 23: 495-566.
I wish I could see natural selection happening in real time.
Junk DNA—or, as scientists call it nowadays, noncoding DNA—remains a mystery: No one knows how much of it is essential for life. As one scientist mused, “Is the genome a trash novel, from which you can remove a hundred pages and it doesn’t matter, or is it more like a Hemingway, where if you remove a page, the story line is lost?” However enigmatic, though, noncoding DNA has proved mighty useful for scientists in one way—it’s great for tracking evolution, through so-called DNA clocks. DNA clocks take advantage of the fact that DNA mutates at a constant rate: Every so many years, a new mutation should pop up along a stretch of DNA. So in examining the natural history of two related species—which once had the same DNA sequence—a scientist can count the number of different mutations that have accumulated along a stretch, and estimate from that how many years have passed since the species started drifting apart. Except it’s not quite that simple. Mutations can arise anywhere in the genome, in gene DNA and noncoding DNA alike. But mutations to genes have bigger consequences: They can disable proteins and kill a creature. As a result, mutations within genes often get weeded out and don’t get passed on to future generations. Noncoding DNA faces fewer constraints—it can mutate more freely without causing problems when it’s passed along. Counting mutations in noncoding DNA therefore provides more accurate estimates in many cases because the timer there isn’t getting reset.
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Wanna see something cool?
Watch a Brief History of Pretty Much Everything
#FresH #Art
-GoOfOffs
I love being sarcastic to teachers on assignments
1. What are the main ideas of this chapter on Evolution? A. False story telling. To make students upset if they are religious. To piss off my parents because I can't get out of this section of biology.
2. Name parts of evolution you will learn more about? A. You mean what I am forced to learn about but don't care about? All of it. Evolution has no parts to it.
3. What is relative dating? A. Incest.
4. What is a weakness of relative dating? A. Deformed children. You get the idea. My biology teacher hates me but loves me at the same time because I'm able to answer really simple questions. I don't think he reads my assignments anymore. Three of them he has written "Unnecessary" on them. Especially the "Why Sex" I wrote. "Because it's fun and people think it feels good." Everyone in the class said that out loud, well I felt like writing it down! Jerk.
