Viroids are the smallest known agents of infectious diseases that contain small single-stranded RNA – molecule. They lack capsid and have no proteins associated with them. Viroids infect only plants. Whereas, viruses have genetic material surrounded by a protective coat of protein or lipoprotein. The genetic material of viruses are of 4 types – double - stranded DNA, double stranded RNA, single – stranded DNA, single – stranded RNA. They can infect both plants and animals.Answered by Pragya Singh | 1 year ago
Organise a discussion in your class on the topic – Are viruses living or nonliving?
Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases.
What are the characteristic features of Euglenoids?
Give a comparative account of the classes of Kingdom Fungi under the following:
(i) mode of nutrition
(ii) mode of reproduction
What do the terms phycobiont and mycobiont signify?