Which of the following is a significant characteristic of viruses?

  • A
    They are active and alive only inside a host cell.
  • B
    They contain only one type of nucleic acid (either $DNA$ or $RNA$).
  • C
    They are extremely small in size.
  • D
    They are vectors of infectious diseases.

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Which of the following statements is true regarding viruses?

In lichens,asexual reproduction occurs through which of the following?

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Asexual reproduction in lichens occurs through which of the following? $(i)$ Pycniospores $(ii)$ Zoospores $(iii)$ Aplanospores $(iv)$ Soredia $(v)$ Apothecia

$A$: Viroids lack a protective protein coat called a capsid.
$R$: Viroids contain a short strand of $DNA$.

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