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Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
Openclipart, also called Open Clip Art Library, is an online media repository of free-content vector clip art.The project hosts over 160,000 free graphics and has billed itself as "the largest community of artists making the best free original clipart for you to use for absolutely any reason".
A sign at a park featuring Irasutoya illustrations. In addition to typical clip art topics, unusual occupations such as nosmiologists, airport bird patrollers, and foresters are depicted, as are special machines like miso soup dispensers, centrifuges, transmission electron microscopes, obscure musical instruments (didgeridoo, zampoña, cor anglais), dinosaurs and other ancient creatures such ...
The Three Friends of Winter is an art motif that comprises the pine, bamboo, and plum. [1] The Chinese celebrated the pine, bamboo and plum together, for they observed that unlike many other plants these plants do not wither as the cold days deepen into the winter season. [ 2 ]
Plant defense against herbivory or host-plant resistance is a range of adaptations evolved by plants which improve their survival and reproduction by reducing the impact of herbivores. Many plants produce secondary metabolites , known as allelochemicals , that influence the behavior, growth, or survival of herbivores.
January forecast trends colder in the Northeast, but milder in the Northwest. Notice how the outlook for January looks a bit different in the northern tier compared to what the overall picture for ...
Conservation-far is the means of protecting nature by separating it and safeguarding it from humans. [29] Means of doing this include the creation of preserves or national parks. They are meant to keep the flora and fauna away from human influence and have become a staple method in the west.
As seasonal influenza ramps up, and with bird flu continuing to circulate, some public health experts are worried there may be a strain on the public health system. Since the bird flu outbreak ...