Lacyann Dupont November 29, 2019 Animal
Many common terms for seeds and fruit do not correspond to the botanical classifications. In culinary terminology, a fruit is usually any sweet-tasting plant part, especially a botanical fruit; a nut is any hard, oily, and shelled plant product; and a vegetable is any savory or less sweet plant product. However, in botany, a fruit is the ripened ovary or carpel that contains seeds, a nut is a type of fruit and not a seed, and a seed is a ripened ovule.
Hugh Bamford Cott’s 500-page book Adaptive Coloration in Animals, published in wartime 1940, systematically described the principles of camouflage and mimicry. The book contains hundreds of examples, over a hundred photographs and Cott’s own accurate and artistic drawings, and 27 pages of references. Cott focussed especially on ”maximum disruptive contrast”, the kind of patterning used in military camouflage such as disruptive pattern material. Indeed, Cott describes such applications
Mimicry means that one species of animal resembles another species closely enough to deceive predators. To evolve, the mimicked species must have warning coloration, because appearing to be bitter-tasting or dangerous gives natural selection something to work on. Once a species has a slight, chance, resemblance to a warning colored species, natural selection can drive its colors and patterns towards more perfect mimicry. There are numerous possible mechanisms, of which by far the best known are:
Warning coloration can succeed either through inborn behaviour (instinct) on the part of potential predators, or through a learned avoidance. Either can lead to various forms of mimicry. Experiments show that avoidance is learned in birds, mammals, lizards, and amphibians, but that some birds such as great tits have inborn avoidance of certain colors and patterns such as black and yellow stripes.
My husband gave me your Calming Doodles coloring book for Christmas and I LOVE it. The stiff backer board is perfect to support the wonderful heavy weight of the paper. I use markers and love the finish and smooth look I get on the paper. I am a card maker and plan to cut each sheet into 1/4’s to make cards out of each piece. Love having a coloring book I can do something with instead of having lots of white space with an image in the middle of each page. You’ve got a winner here to be sure.
wholly new at the time. It strongly supported Darwin’s theory of sexual selection, arguing that the obvious differences between male and female birds such as the Argus pheasant were selected by the females, pointing out that bright male plumage was found only in species ”which court by day”.The book introduced the concept of frequency-dependent selection, as when edible mimics are less frequent than the distasteful models whose colors and patterns they copy. In the book, Poulton also coined the term aposematism for warning coloration, which he identified in widely differing animal groups including mammals (such as the skunk), bees and wasps, beetles, and butterflies.
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