Oxygenic photosynthesis is found in . . . . . . .

Citrus canker is caused by which of the following?

In bacteria,which of the following statements is correct regarding their genetic material?

In the digestive tract of several ruminant animals like cows and buffaloes,which bacteria are present?

Cyanobacteria and heterotrophic bacteria have been clubbed together in eubacteria of kingdom-Monera as per the "five kingdom classification", even though the two are vastly different from each other. Is this grouping of the two types of taxa in the same kingdom justified? If so, why? Discuss the cellular composition of cyanobacteria and heterotrophic bacteria that make them classified as eubacteria.

$P -$ Assertion: Blue-green algae are prokaryotic algae.
$Q -$ Reason: Ribosomes in blue-green algae are of the $70S$ type.