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
... emerging viral disease . From where and how do such viruses burst on the human scene , giving rise to previously rare or unknown diseases ? Three processes contribute to the emergence of viral diseases . First , the mutation of existing ...
... emerging viral disease . From where and how do such viruses burst on the human scene , giving rise to previously rare or unknown diseases ? Three processes contribute to the emergence of viral diseases . First , the mutation of existing ...
Page 62
... emerging viruses are generally not new ; rather , they are 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 ...
... emerging viruses are generally not new ; rather , they are 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 ...
Page 72
... emerging virus . 2. Compare horizontal versus vertical transmission of viruses in plants . 3. Why does the long incubation period of prions increase their danger as a cause of human disease ? For suggested answers , see Appendix A ...
... emerging virus . 2. Compare horizontal versus vertical transmission of viruses in plants . 3. Why does the long incubation period of prions increase their danger as a cause of human disease ? For suggested answers , see Appendix A ...
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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