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Coronavirus attaches to host cell by

Viroids are

All members of a species occupying a particular area at the same time is termed as

The genetic material of the viruses could be DNA or RNA.

Match the type of RNA with its function.

Selection which occurs when one extreme phenotype is favored is called

Which type of genetic recombination occurs  when DNA is passed through a sex pilus between two bacteria?

Which is not a base found in DNA?

Antigens on viruses can change through which of these mechanisms?

Considering various theories, the energy source for forming organic molecules in the primitive atmosphere could have been