Phyla
Yes, the noun 'bacteria' is the plural form of the singular noun 'bacterium'.
Labia minora is the plural form of labia minus and labia majora is the plural form of labia majus.
The noun genetics is a plural, uncountable (mass) noun with no singular form. The noun genetics is a type of aggregate noun, a word representing an indefinite number of elements or parts. The word genetic is an adjective, a word that describes a noun.
The plural of organ is organs.
Techincally, bacteria is plural. Bacterium is the singular. The reality of contemporary usage is that most people are unfamiliar with the word "bacterium" and use bacteria for both the singular and plural. However, you should try to avoid using bacteria as a singular in formal communication.
The plural of phylum is 'phyla'.
The plural form of phylum is phyla.
phylums
The plural form of the noun 'phylum' is phyla.
The word phyla is plural of the singular noun phylum.
The plural form for the demonstrative pronoun this is these.
The plural form of the word inferno is infernos.
The plural form is ranches.
There is no plural form for the word, countries. This word itself is a plural.
There is no plural word for if.
The plural form is data.
The plural form for the word 'pioneer' is pioneers.