The cells of the bacterium $Streptococcus$ remain arranged in the form of

Select the correct option for chemoautotrophs:

Which of the following are found in extreme saline conditions?

$A$: Bacillus and Coccus types of bacteria are found in colonial forms.
$R$: In bacteria,cells formed by cell division remain surrounded by a secreted slimy substance.

Organisms known as methanogens are found in abundance in ............ .

Spliceosomes are not found in the cells of .............