VIRUS VIROIDS and LICHENS

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For more information: • http://www.7activestudio.com • [email protected] • Contact: +91- 9700061777 • • 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force The Joy of Happy Learning -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. • • Viruses are not placed in a proper kingdom as they are not truly ‘living’. • Viruses are non-cellular organisms and they have an inert crystalline structure outside the living cell. • Viroids • Discovered by T.O.Diener in 1971. • Smaller than virus and lack protein coat, hence called viroids. • It has a free RNA of low molecular weight. • It caused potato spindle tuber disease. • The mutually beneficial symbiotic association between algae and fungi is known as lichens. • The algal component is known as phycobiont and fungal component as mycobiont which are autotrophic and heterotrophic, respectively. • Algae prepare food for fungi and fungi provide shelter and absorb mineral nutrients and water for its algal component.

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