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Enantiotopic groups are identical and indistinguishable except in chiral environments. For instance, the CH 2 hydrogens in ethanol (CH 3 CH 2 OH) are normally enantiotopic, but can be made different (diastereotopic) if combined with a chiral center, for instance by conversion to an ester of a chiral carboxylic acid such as lactic acid, or if coordinated to a chiral metal center, or if ...
One textbook example of heterotopy in animals, a classic in genetics and developmental biology, is the experimental induction of legs in place of antennae in fruit flies, Drosophila. The name for this specific induction is 'antennapedia'.
Heterotopia within the brain is often divided into three groups: subependymal heterotopia, focal cortical heterotopia and band heterotopia. Another example is a Meckel's diverticulum, which may contain heterotopic gastric or pancreatic tissue. In biology specifically, heterotopy refers to an altered location of trait expression. [1]
In an economic model, an exogenous variable is one whose measure is determined outside the model and is imposed on the model, and an exogenous change is a change in an exogenous variable. [ 1 ] : p. 8 [ 2 ] : p. 202 [ 3 ] : p. 8 In contrast, an endogenous variable is a variable whose measure is determined by the model.
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
Biological economics is an interdisciplinary field in which the interaction of human biology and economics is studied. The journal Economics and Human Biology covers the field and has an impact factor of 2.722.
Static equilibrium (economics), the intersection of supply and demand in any market; Sunspot equilibrium, an economic equilibrium in which non-fundamental factors affect prices or quantities; Underemployment equilibrium, a situation in Keynesian economics with a persistent shortfall relative to full employment and potential output
The pygmy mammoth is an example of insular dwarfism, a case of Foster's rule, its unusually small body size an adaptation to the limited resources of its island home.. A biological rule or biological law is a generalized law, principle, or rule of thumb formulated to describe patterns observed in living organisms.