In a bacterial cell, function of fimbriae is

Viruses contain ribosomes.

The Archaea include all of the following EXCEPT the

Archaeal species that live in salty habitats are known as

Which of these is the most accurate description about viruses?

Photosynthetic bacteria introduced oxygen in the atmosphere of primitive earth.

Bacteria that derive energy from hydrogen sulphide, ammonia or iron are known as

Which of the following is thought to have been absent from the primitive reducing atmosphere?

Coronavirus attaches to host cell by

The shape of cocci is