Which of the following is a characteristic feature of the kingdom $Monera$?

Bacteria are included in which of the following kingdoms?

Blue-green algae show the closest resemblance to which of the following?

In which of the following are gas vacuoles found?

Assertion: Gram-negative bacteria do not retain the stain when washed with alcohol.
Reason: The outer face of the outer membrane of Gram-negative bacteria contains lipopolysaccharides,a part of which is integrated into the membrane lipids.

$Trichodesmium\, erythraeum$,which gives the Red Sea its characteristic red color,is a/an ........