In members of which kingdom,nuclear membrane is absent?

The existence of the process of transformation in cyanobacteria has been experimentally established by

Which of the following organisms live in extremely salty areas?

Endospores formed by certain bacteria are actually the means for

In which of the following organisms are hormones normally absent?

$......$ bacteria oxidise various inorganic substances such as nitrites,ammonia and use the released energy for $\text{ATP}$ production $:-$