Protozoa
The amoeba has no definite form.
The plural form of ficus is ficuses.
The plural form of hemp is hemp.
Toxoplasma gondii is the most common protozoan associated with encephalitis in AIDS patients.
Protozoan Cyst is a defense mechanism in the Protozoan family. It takes this form according to the conditions of the host. A change in pH, a change in oxygen supplies, anything that trigers the genetic mechanism. The cyst is evacuated trough the sediment. You could say that Cyst are a defense mechanism. It can last days in the outside and the final intention is to get into another host. This is not a infectious form of Protozoan, but it is a transmition form.
The plural of the noun protozoon is protozoa or more rarely protozoons.*The similar term protozoan has the plurals protozoa or protozoans.
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "was" is "were."
The plural form of "I" is "we."
The plural form of "is" is "are."
"Groceries" is the plural form of "grocery."
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
The plural form of mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.
The plural form of the demonstrative pronoun 'that' is those.
Trenches is the plural form.