The following points highlight the six main symptoms of viral diseases. The symptoms are: 1. Mosaic Spotting 2. Ring Spotting 3. Chlorosis 4. Distortion 5. Necrosis 6. Breaking of Blossoms. Symptom # 1. Mosaic Spotting: In this case usually the leaves, sometimes the blossoms and other parts of the host plants show spots or patches […]
6 Main Symptoms of Viral Diseases | Virology
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Theories on Living Hypothesis of Viruses | Virology
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The following points highlight the two main theories on living hypothesis of viruses. The theories are: 1. Organism Theory 2. Molecular Theory. Theory # 1. Organism Theory: The supporters of the living hypothesis argue that growth and reproduction are chief distinctive characteristics of living things (organisms). Viruses possess both. They grow, reproduce and undergo mutations […]
Viroids: Subject-Matter and Origin | Virology
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In this article we will discuss about viroids which are smallest known agents of infectious diseases and are not related to viruses. Subject-Matter of Viroids: Diener (1971), during his studies on Potato spindle Tuber disease assumed to be caused by a virus, discovered that the causal organism was made up of naked free RNA devoid […]
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