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Evolutionary adaptation

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In the course of evolution, leaves have adapted to different environments in the following ways: citation needed Waxy micro- and nanostructures on the surface reduce wetting by rain and adhesion of contamination ( See Lotus effect ). Divided and compound leaves reduce wind resistance and promote cooling. Hairs on the leaf surface trap humidity in dry climates and create a boundary layer reducing water loss. Waxy plant cuticles reduce water loss. Large surface area provides a large area for capture of sunlight. In harmful levels of sunlight, specialized leaves, opaque or partly buried, admit light through a translucent leaf window for photosynthesis at inner leaf surfaces (e.g. Fenestraria ). Kranz leaf anatomy in plants who perform C4 carbon fixation Succulent leaves store water and organic acids for use in CAM photosynthesis. Aromatic oils, poisons or pheromones produced by leaf borne glands deter herbivores (e.g. eucalypts). Inclusions of crystalline minerals deter herbivor
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24) Republic Day 2020 Parade FEATURES: Colourful tableaux, daredevilry, navy might on display

India Republic Day -- The indian subcontinent Republic Day 2020 Parade, Flag Hosting HIGHLIGHTS: Primary Minister Narendra Modi paid out his tributes to martyrs by laying a wreath at the National War Memorial in the presence of Support Minister Rajnath Singh, the three service chiefs and Primary of Defence Staff Bipin Rawat. India Republic Morning Parade 2020, Flag Web host HIGHLIGHTS: India is drinking its 70th Republic Morning Today. The celebration with Rajpath started with Primary Minister Narendra Modi paying out homage to the fallen military at the newly-built National War Memorial on the Republic Morning for the first time instead of the Amar Jawan Jyoti beneath the India Gate arch. This was followed by Chief executive Ram Nath Kovind unfurling the tricolour. The special occasion marks the day when India’s Constitution came into effect, and also the country became a republic. Heavylift helicopter Chinook and also attack helicopter Apache, the two recently inducted in the Nat
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Anatomy

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Medium-scale features edit Leaves are normally extensively vascularized and typically have networks of vascular bundles containing xylem, which supplies water for photosynthesis, and phloem, which transports the sugars produced by photosynthesis. Many leaves are covered in trichomes (small hairs) which have diverse structures and functions. Small-scale features edit The major tissue systems present are The epidermis , which covers the upper and lower surfaces The mesophyll tissue inside the leaf, which is rich in chloroplasts (also called chlorenchyma ) The arrangement of veins (the vascular tissue) These three tissue systems typically form a regular organization at the cellular scale. Specialized cells that differ markedly from surrounding cells, and which often synthesize specialized products such as crystals, are termed idioblasts . Major leaf tissues edit Epidermis edit The epidermis is the outer layer of cells covering the leaf. It is covered with a waxy cuticle which is impe
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