Q) Suggest reasons for the polyphyletic evolution of viruses
Main points | |
Key idea: | Polyphyletic evolution + Reasons |
· Results of sequencing of viral nucleic acids - viruses probably evolved from multiple origins (i.e. polyphyletic evolution) since their common ancestors cannot be determined easily · Reasons : (i) many diff types of viruses, (ii) all viruses are obligate parasites where they require a host cell for reproduction, so they evolve with their host cells including developing adaptive changes (e.g. to escape detection by immune cells) | |
Key idea: | Possible origin of viruses |
·Through sequencing studies, viruses could originate as degenerate cell that lost their struc over time or were genes that ‘escaped’ from cells | |
Comments: (i) Verbalize the answer + write down the main points w/o referring to the answer (use abbreviations) (ii) Read again within the next 24h & once more within 72h (do not spend more than 10min) (iii) I have added an additional point to the worked solution (i.e. possible origin of viruses) | |
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