Answered: What of these key features order, ,…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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What of these key features order, , reproduction, response to the environment , energy processing, regulation and evolution do viruses have? Also what key features don’t they have?

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The term 'Virus 'is derived from a Latin word which means 'poison'. Viruses are simple, noncellular entities consisting of one or more molecules of either DNA or RNA enclosed in a coat of protein called the capsid. Viruses are smaller than prokaryotic cells ranging from 002 to 0.3 $μ$ m in size. A virus is both living and nonliving. It is inert (inactive) outside the host cell, so are nonliving organisms. Viral nucleic acids are active (multiply and infect) inside the living host cell, so are living. A fully assembled virus that is infectious is called a virion. The function of the virion is to transfer its DNA or RNA into the host cell. So viruses are obligate intracellular parasites.

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