Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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why are bacteria considered living organisms, while viruses are usually considered non living?
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Step 1: Living World
Everything present on this planet can be broadly divided into two categories - living and non-living.
The non-living things constitute the earth, water, and the air. Stones, chemicals, gases, elements metal and non-metal, compounds and mixes are all non-living forms.
Living forms range from primitive, prokaryotic unicellular organisms like bacteria and archaea to eukaryotic unicellular to muticellular organisms. As the body organization increases, life forms become more complex.
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- Why are viruses not considered living organisms?arrow_forwardWhy are viruses are not regarded as true living cells?arrow_forwardContrary to human cells, most bacteria and viruses both have which of the following? A) Presence of a cell wall B) Presence of a nucleus C) Higher rate of genetic mutations D) Absence of replication capacitiesarrow_forward
- All the followings are biological acellular entities except: a) Bacteriophages b) Bacteria c) Viroid d) Virions e) Prionsarrow_forwardAccording to the seven characteristics of life (1- composed of one or more cells, 2- compelx and organized, 3- respond to environment, 4- grow, develop, and reproduce, 5- obtain and use energy, 6- mainatin homeostasis, 7- allow for evolutionary adaptation), are viruses alive?arrow_forwardWhich of the following statements about viruses is true?a) They contain DNAb) They contain RNAc) They contain proteind) They are susceptible to lipid solventsarrow_forward
- are viruses alive ?arrow_forwardLacking ribosomes, how can viruses be placed on the universaltree of life?arrow_forwardWhich of the following highly contagious viruses is a single-stranded ribonucleic acid (RNA) virus with a helical capsid and envelope and is transmitted by coming in contact with respiratory secretions? "This is a highly contagious respiratory illness transmitted when an infected person coughs or sneezes virus particles into the air," the health department said in a written statement. "It's so contagious that if one person is sick and spreading measles, nine out of 10 people around them who aren't immune will get it, too." Group of answer choices a. Measles b. Parvovirus c. Coxsackie virus A d. Rhinovirusarrow_forward
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