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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.
Nursing ethics is a branch of applied ethics that concerns itself with activities in the field of nursing. Nursing ethics shares many principles with medical ethics , such as beneficence , non-maleficence , and respect for autonomy .
In healthcare, Carper's fundamental ways of knowing is a typology that attempts to classify the different sources from which knowledge and beliefs in professional practice (originally specifically nursing) can be or have been derived. It was proposed by Barbara A. Carper, a professor at the College of Nursing at Texas Woman's University, in 1978.
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Like medical ethics, nursing ethics is very narrow in its focus, especially when compared to the expansive field of bioethics. For the most part, "nursing ethics can be defined as having a two-pronged meaning," whereby it is "the examination of all kinds of ethical and bioethical issues from the perspective of nursing theory and practice."
Hennig coined the key terms synapomorphy, symplesiomorphy, and paraphyly. He also asserted, in his "auxiliary principle", that "the presence of apomorphous characters in different species 'is always reason for suspecting kinship [i.e., that species belong to a monophyletic group], and that their origin by convergence should not be presumed a ...
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]