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In phylogenetics, a plesiomorphy ("near form") and symplesiomorphy are synonyms for an ancestral character shared by all members of a clade, which does not distinguish the clade from other clades. Plesiomorphy, symplesiomorphy, apomorphy, and synapomorphy all mean a trait shared between species because they share an ancestral species.
Symplesiomorphy – an ancestral trait shared by two or more taxa. Plesiomorphy – a symplesiomorphy discussed in reference to a more derived state. Pseudoplesiomorphy – a trait that cannot be identified as either a plesiomorphy or an apomorphy that is a reversal. [15]
The terms "plesiomorphy" and "apomorphy" are typically used in the technical literature: for example, when a plesiomorphic trait is shared by more than one member of a clade, the trait is called a symplesiomorphy, that is, a shared primitive trait; a shared derived trait is a synapomorphy.
Symplesiomorphy – an ancestral trait shared by two or more taxa. Plesiomorphy – a symplesiomorphy discussed in reference to a more derived state. Pseudoplesiomorphy – is a trait that cannot be identified as neither a plesiomorphy nor an apomorphy that is a reversal.
A diffeomorphism between two symplectic manifolds: (,) (, ′) is called a symplectomorphism if ′ =, where is the pullback of .The symplectic diffeomorphisms from to are a (pseudo-)group, called the symplectomorphism group (see below).
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An education savings plan allows a saver to open an investment account for the benefit of a future student. These plans can pay for tuition, as well as room and board, and some other qualified ...
It makes the process of nursing assessment visible through what is presented in the documentation content. [4] During nursing assessment, a nurse systematically collects, verifies, analyses and communicates a health care client's information to derive a nursing diagnosis and plan individualized nursing care for the client. [5]