14 Apr 2012. Home INR monitors are simple to use and provide accurate results. You don't need any medical experience or technology skills to perform the simple INR test. The listed monitors are all approved for professional and home use allowing you immediate INR test values resulting in improved care.
Lampreys and hagfishes are the only jawless vertebrates to survive today. They both have a round mouth and for this reason are often referred to as cyclostomes. They are the most primitive of the vertebrates. By primitive, a biologist means that they are the least changed from the first vertebrates.1  They have no paired pectoral (shoulder) or pelvic (hip) fins. 2  Their notochord persists for life, never being completely replaced by a backbone even in the lampreys.3  They have no scales.y primitive, a biologist means that they are the least changed from the first vertebrates. 1  They have no paired pectoral (shoulder) or pelvic (hip) fins. 2  Their notochord persists for life, never being completely replaced by a backbone even in the lampreys. 3  They have no scales.
From Wikipedia, the free encyclopedia. Primitive in phylogenetics means a character, trait or feature of a lineage or taxon that is inherited from a common ancestor and has undergone little change since. The term in biology contains no judgment involving the sophistication, superiority, value or adaptiveness of a trait.Primitive in biology means only that the trait appeared first in the ancestors and has been passed on largely intact to more recent members of the group.he term in biology contains no judgment involving the sophistication, superiority, value or adaptiveness of a trait. Primitive in biology means only that the trait appeared first in the ancestors and has been passed on largely intact to more recent members of the group.