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Do You Know
Questions & Answers on General Knowledge.

What is lichen?
Thought to be among the oldest living things on Earth, lichen is a unique growth that is made up of a fungus and either green algae or bacteria called cyanobacteria. The algae or bacteria live underneath the sheltering fungus, and provide it with sugars (food) from photosynthesis. In return, they receive protection from the sunlight and are able to live without drying out. In this way, lichen represents one of the most unique living "partnerships" on Earth. Lichen is a hardy plant that grows on all kinds of bare surfaces in extreme environments, such as rocks, tree trunks, desert sand, cleared soil, and living bark. Most kinds grow very slowly—often less than 1 millimeter per year.
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  • Benefits of Grapes

    Protect Your Heart

    In research, resveratrol demonstrated the ability to improve the dilation of blood vessels, which may allow blood to flow more easily through blood vessels. It has also been shown to relax the walls of the blood vessels, making their diameter larger, thereby lowering blood pressure, and allowing a higher volume of blood to flow through all areas of the body, delivering increased oxygen and nutrients to the bodys cells. Another study found that just 10 mg of supplementary resveratrol resulted in a dramatic reduction in heartattack risk factors.

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