Who stated that viruses are crystalline?

Which of the following is an example of an animal virus?

Which characteristic does a virus exhibit when it is inside a host cell?

Which of the following structures acts as a connecting link between living and non-living organisms?

Which of the following is a plant virus?

Assertion $A$: Lichens are symbiotic associations between algal and fungal components. Reason $R$: The mycobiont components of fungi are heterotrophic. Which option is correct for Assertion $A$ and Reason $R$?