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Change in the shape of the hip may have led to the decrease in the degree of hip extension, an energy efficient adaptation. [1] [14] The ilium changed from a long and narrow shape to a short and broad one and the walls of the pelvis modernized to face laterally. These combined changes provide increased area for the gluteus muscles to attach ...
The adaptive traits may be structural, behavioural or physiological. Structural adaptations are physical features of an organism, such as shape, body covering, armament, and internal organization. Behavioural adaptations are inherited systems of behaviour, whether inherited in detail as instincts, or as a neuropsychological capacity for learning.
The stapes was thought to be just a structural support between the palate and the stapedial plate of the braincase. [9] In the Acanthostega, it is likely that due to the otic capsule of the brain case being mesial to the stapedial plate, sound was picked up from the palate or the otic notch to allow for rudimentary hearing. It was able to ...
In cell biology and pathophysiology, cellular adaptation refers to changes made by a cell in response to adverse or varying environmental changes. The adaptation may be physiologic (normal) or pathologic (abnormal). Morphological adaptations observed at the cellular level include atrophy, hypertrophy, hyperplasia, and metaplasia. [1]
Stephen J. Gould and Richard Lewontin proposed biological "spandrels", features created as a byproduct of the adaptation of nearby structures. Gerd B. Müller and Stuart A. Newman argued that the appearance in the fossil record of most of the phyla in the Cambrian explosion was "pre-Mendelian" [a] evolution caused by physical factors.
Morphology of a male skeleton shrimp, Caprella mutica Morphology in biology is the study of the form and structure of organisms and their specific structural features. [1]This includes aspects of the outward appearance (shape, structure, color, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of internal parts like bones and organs, i.e. internal ...
This adaptation is primarily found in semiaquatic species, and has convergently evolved many times across vertebrate taxa. Unlike other waders , the pied avocet has webbed feet, and can swim well. It likely arose from mutations in developmental genes that normally cause tissue between the digits to apoptose .
Wolff's law, developed by the German anatomist and surgeon Julius Wolff (1836–1902) in the 19th century, states that bone in a healthy animal will adapt to the loads under which it is placed. [1]