6.most conifers: in some systems classified as a class (Pinopsida) and in others as a subdivision (Pinophytina); used in some classifications forone of five subdivisions of Gymnospermophyta.
9.Five methods for multi-class classification are introduced based on widely used SVMs. They are one versus rest(OVR),one versus one(OVO),binary tree(BT),error correcting output codes(ECOC) and directed acyclic graph(DAG).