Biology, Pages 334-346Neil Campbell and Jane Reece's BIOLOGY remains unsurpassed as the most successful majors biology textbook in the world. This text has invited more than 4 million students into the study of this dynamic and essential discipline. |
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Page 58
... First , the mutation of existing viruses is a major source of these new diseases . RNA viruses tend to have an unusually high rate of mutation because errors in replicating their RNA genomes are not corrected by proofreading . Some 58 เ.
... First , the mutation of existing viruses is a major source of these new diseases . RNA viruses tend to have an unusually high rate of mutation because errors in replicating their RNA genomes are not corrected by proofreading . Some 58 เ.
Page 59
... existing viruses to evolve into new genetic varieties ( strains ) that can cause disease in individuals who had developed immunity to the ancestral virus . Flu epidemics , for instance , are caused by new strains of influenza virus ...
... existing viruses to evolve into new genetic varieties ( strains ) that can cause disease in individuals who had developed immunity to the ancestral virus . Flu epidemics , for instance , are caused by new strains of influenza virus ...
Page 62
... existing viruses that mutate , spread to new host species , or disseminate more widely in the current host species . Changes in host behavior or environmental changes can increase the viral traffic responsible for emerging diseases ...
... existing viruses that mutate , spread to new host species , or disseminate more widely in the current host species . Changes in host behavior or environmental changes can increase the viral traffic responsible for emerging diseases ...
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animal viruses bacterial cell bacterial chromosome bacteriophage bacterium bind to specific capsid cause disease cellular enzymes circular coli cell Cycles of Phages DNA molecule double-stranded emerging viruses enter the host enveloped viruses eukaryotes existing viruses Figure genetic recombination glycoproteins herpesvirus host cell host range host species human disease immune system kill the host lysogenic cycle lytic cycle mechanisms membranous envelope microbes model systems mosaic virus TMV mRNA mutation natural selection favors nucleic acid obligate intracellular parasites particles phage DNA plant to plant plant viruses plasmids plasmodesmata polymerase prions prokaryotic prophage genes protein coat provirus restriction enzymes retrovirus reverse transcriptase RNA viruses Scientists simplest spread stranded RNA symptoms syndrome synthesis temperate phage template tobacco mosaic virus transcribed transposons type of virus vaccines vertical transmission viral diseases viral DNA viral envelope viral genome viral infection viral nucleic acid viral proteins viral reproductive cycle viroids virulent phage viruses and bacteria viruses cause