Viruses can be classified on the basis of:
Correct answer: D. All of these
- A. Shape
- B. Nucleic acid
- C. Envelope
- D. All of these
Explanation
Viruses are grouped by their overall shape, the type of genetic material they carry, and whether or not they have an outer envelope. These features help distinguish one group of viruses from another and hint at how they replicate and spread.
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