The S3 is the battalion's operations and training officer. A member of the battalion's command staff, an S3 typically holds the rank of major or lieutenant colonel in the Army. The S3 is also the battalion training officer, ensuring the ongoing military education of the battalion's personnel.
The Apicomplexa (also called Apicomplexia) are a large phylum of parasitic protists. Most of them possess a unique form of organelle that comprises a type of plastid called an apicoplast, and an apical complex structure.
The Apicomplexa comprise the bulk of what used to be called the Sporozoa, a group of parasitic protozoans, in general without flagella, cilia, or pseudopods.Most of the Apicomplexa are motile however, by use of a gliding mechanism that uses adhesions and small static myosin motors.he first Apicomplexa protozoan was seen by Antonie van Leeuwenhoek, who in 1674 saw oocysts of Eimeria stiedae in the gall bladder of a rabbit. The first member of the phylum to be named (by Dufour in 1828) was Gregarina ovata in earwigs.