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1975: Two English biologists, Robin Holliday and John Pugh, and an American biologist, Arthur Riggs, independently suggested that methylation, a chemical modification of DNA that is heritable and can be induced by environmental influences, including physical and emotional stresses, has an important part in controlling gene expression.
The intent of The Botanic Garden, one of the first popular science books, is to pique readers' interest in science while educating them at the same time. By embracing Linnaeus's sexualized language, which anthropomorphizes plants, Darwin intended to make botany interesting and relevant to the readers of his time.
The like would never happen to General Cass; place the stacks a thousand miles apart, he would stand stock still midway between them, and eat them both at once, and the green grass along the line would be apt to suffer some too at the same time." [15] (This being a reference to Cass's support for "popular sovereignty" in the run-up to the Civil ...
According to the special theory of relativity introduced by Albert Einstein, it is impossible to say in an absolute sense that two distinct events occur at the same time if those events are separated in space. If one reference frame assigns precisely the same time to two events that are at different points in space, a reference frame that is ...
Alfred R. Ferguson wrote of the poem, "Perhaps no single poem more fully embodies the ambiguous balance between paradisiac good and the paradoxically more fruitful human good than 'Nothing Gold Can Stay,' a poem in which the metaphors of Eden and the Fall cohere with the idea of felix culpa." [5] John A. Rea wrote about the poem's "alliterative ...
John Keats dedicated this poem to the late poet Thomas Chatterton. The poem begins with the line "A thing of beauty is a joy for ever". Endymion is written in rhyming couplets in iambic pentameter (also known as heroic couplets). Keats based the poem on the Greek myth of Endymion, the shepherd beloved of the moon goddess Selene.
The poem in fact explores, instead of asserting, the pantheistic union of man and nature through a quintessential life-and-death force. For all the poet shares with 'the crooked rose', either as destroyer or victim, he cannot make himself heard ('I am dumb to tell' is repeated five times as a refrain), a failure that unwittingly distinguishes a ...
As the poem ends, the trance caused by the nightingale is broken and the narrator is left wondering if it was a real vision or just a dream. [24] The poem's reliance on the process of sleeping is common to Keats's poems, and "Ode to a Nightingale" shares many of the same themes as Keats' Sleep and Poetry and Eve of St. Agnes. This further ...