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What is the use of needle-like leaves and sloped branches to Pinus?

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Hint: The needle line leaves actually offer some clever points of interest over leaves—particularly in extreme atmospheres or soil conditions: Needles have a thick, waxy covering that holds more water than a normal leaf.

Complete answer:
Pinus: Huge and financially significant sort (the kind of the family Panacea) of coniferous evergreen trees predominantly of mild districts of the northern side of the equator that incorporates a number which yield items (as pine tar) with restorative applications.

Evergreen conifers are the oldest trees in the world, and this is for good reason. Needles have a variety of adaptations that enable them to survive in areas that pose a challenge to most plants, such as areas with heavy snowfall or very dry soil. Some of these adaptation measures have multiple uses, such as water retention and cold protection. During heavy snowfall, snow will accumulate on branches, leaves or needles. The conical shape of conifers (mountains) can prevent snow accumulation, while broad trees can accumulate snow. The cone shape of the tree also helps to make the snow fall off the tree quickly and get sunlight.

Note: The cone-like state of conifer trees (mountain) forestalls as much gathering of snow as there would be on a more extensive molded tree. The cone-like state of the tree likewise assists with getting the snow to tumble off the tree rapidly and to get the daylight.