evolutionary grade

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• Evolutionary grade — In alpha taxonomy, a grade refers to a level of morphological and/or physiological complexity. Organisms may be grouped by the grade of organisation they display without making any implications about their phylogenetic relationship. Due to… …   Wikipedia

• Grade — NOTOC Grade may refer to:In education* Grade (education), a teacher s evaluation of a student s performance * Grade level, the numbering of the year a student has reached in school.In civil engineering* Grade (slope), the pitch of a slope such as …   Wikipedia

• Evolutionary history of plants — Plants have evolved through increasing levels of complexity, from the earliest algal mats, through bryophytes, lycopods, ferns and gymnosperms to the complex angiosperms of today. While the simple plants continue to thrive, especially in the… …   Wikipedia

• ANITA grade — The ANITA grade refers to the evolutionary grade comprising the plant taxa Amborella , Nymphaeaceae and Austrobaileyales. These are thought to be the most basal angiosperm lineages, and so are of immense interest to systematic botanists …   Wikipedia

• Cladistics — For the scientific journal, see Cladistics (journal). Part of a series on Evolutionary Biology …   Wikipedia

• Clade — For other uses, see Clade (disambiguation). Cladogram (family tree) of a biological group. The red and blue boxes represent clades (i.e., complete branches). The green box is not a clade, but rather represents an evolutionary grade, an incomplete …   Wikipedia

• Embryophyte — Land plants Temporal range: Late Silurian–Recent[1][2] (Spores from Dapingian (early Middle Ordovician) …   Wikipedia

• salmoniform — ▪ fish Introduction       any member of the order Salmoniformes, a diverse and complex group of fishes. The order consists of about 1,000 species in the freshwaters and in the oceans of the world. Included are the familiar trout, salmon, and pike …   Universalium

• Historical race concepts — Race Classification Race (classification of humans) Genetics …   Wikipedia

• Paraphyly — A cladogram showing a hypothetical descent from an ancestor species of the clade vertebrata.[1] Note that cladograms do not necessarily correspond to taxonomic classifications. In this one, Sauropsida are a paraphyletic group. It can be made… …   Wikipedia

• Newt — This article is about the animal. For other uses, see Newt (disambiguation). Newts Smooth newt (Lissotriton vulgaris) Scientific classification Kingdom …   Wikipedia