According to the five-kingdom classification system,blue-green algae are included in which kingdom?

$Streptomyces$ is included in which of the following?

In the vast marine ecosystem, certain seas develop red colouration. This red colour is due to the presence of a large population of which one of the following organisms?

What is the full form of $E. coli$?

The structure that participates in bacterial sexual reproduction is called .........

Hormogonia of cyanobacteria are