Flowers' wings, fruitflies' petals
نویسندگان
چکیده
منابع مشابه
An interstice relationship for flowers with four petals
Given three mutually tangent circles with bends (or the reciprocal of the radius) a, b and c respectively, an important quantity associated with the triple is the value 〈a, b, c〉 := ab + ac + bc. In this note we show in the case when a central circle with bend b0 is “surrounded” by four circles, i.e., a flower with four petals, with bends b1, b2, b3, b4 that either p 〈b0, b1, b2〉 + p 〈b0, b3, b...
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Flower opening is an event accompanied by morphological changes in petals which include elongation, expansion, and outward-curving. Petal cell growth is a fundamental process that underlies such phenomena, but its molecular mechanism remains largely unknown. Suppression subtractive hybridization was performed between petals during the early elongation period (stage 1) and during the opening per...
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It is with much interest that we read recent exchanges which employed the discourses of threat and protection to explore the genesis and nature of the CanMEDs framework. 1,2 Different discourses allow us to consider familiar subjects from a new perspective, and it is thus that we would like to suggest an alternative discourse which has arisen in our day-to-day use of CanMEDs: namely the discour...
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ژورنال
عنوان ژورنال: Nature
سال: 2003
ISSN: 0028-0836,1476-4687
DOI: 10.1038/422123a