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- Transitional armour describes the armour used in Europe around the 13th and 14th centuries, as body armour moved from simple mail hauberks to full plate armour. The couter was added to the hauberk to better protect the elbows, and splinted armour and the coat of plates provided increased protection for other areas.
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Transitional armour describes the armour used in Europe around the 13th and 14th centuries, as body armour moved from simple mail hauberks to full plate armour. The couter was added to the hauberk to better protect the elbows, and splinted armour and the coat of plates provided increased protection for other areas.
Sep 14, 2011 · 1. Introduction. Transitional forms.Charles Darwin was well aware that his theory of descent with modification required the existence of transitional forms between species; indeed, the lack of such forms was one of the main arguments initially used by its opponents.
- Emmanuel G. Reynaud, Damien P. Devos
- 2011
Jun 9, 2010 · Abstract. The origin of turtles is one of the most contentious issues in systematics with three currently viable hypotheses: turtles as the extant sister to (i) the crocodile–bird clade, (ii) the lizard–tuatara clade, or (iii) Diapsida (a clade composed of (i) and (ii)). We reanalysed a recent dataset that allied turtles with the lizard ...
- Tyler R. Lyson, Gabe S. Bever, Bhart Anjan S. Bhullar, Walter G. Joyce, Jacques A. Gauthier
- 2010
“Transitional fossils informing the origin of turtles are among the most sought-after discoveries in palaeontology” (Bever et al. 2015: 239). The earliest known turtles (Testudinata: including terrapins, tortoises, and turtles) are from the Late Triassic (Joyce 2017; Joyce et al. 2013), nearly 240 Mya, and the earliest stem-turtles (not turtles, but taxa more closely related to turtles ...
Sep 22, 2008 · Transitional Forms. Intermediates between modern forms; Fossils of live birth; Mammal eggs and reptile placentas; Lungs. Parabronchi; Bird diaphragms; Dinosaur diaphragms; Hearts. Mammalian hearts; Crocodilian Hearts; Dissent in Science. Nature of Science. Is this how science works? References; Disagreement; Debates; Expert Witnesses ...
Sep 25, 2008 · As Benton and Donoghue observe, "Fossils can provide good 'minimum' age estimates for branches in the tree, but 'maximum' constraints on those ages are poorer." In order to find a fossil possessing a transitional feature, it is necessary for that feature to have evolved, for the population in which it evolved to diversify, and for some ...
The evolution of biological complexity is one important outcome of the process of evolution. [1] Evolution has produced some remarkably complex organisms – although the actual level of complexity is very hard to define or measure accurately in biology, with properties such as gene content, the number of cell types or morphology all proposed ...
