alleryA viroid differs from a virus in having no:
AGenetic core
BInfective power
CHost organism
DProtein coat
Answer & Solution
Correct answer: D. Protein coat
1. Diener found it in 1971 in potato spindle tuber disease.
2. It turned out to be free RNA.
3. It lacks the protein coat a virus has.
_Source: syllabus Biology, Ch 2 'Biological Classification'_
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