منابع مشابه
Senescence in Animals: Why Evolutionary Theories Matter
This is a clearly deleterious process, which seems difficult to conciliate with natural selection, which predicts evolution towards increasing fitness. Historically, the first evolutionary explanation able to conciliate these two processes is known as the mutation accumulation theory (Medawar, 1952). According to this theory, in age-structured populations the force of selection decreases with i...
متن کاملWhy Humans Are Unique: Three Theories.
Three recent papers reject Darwin's claim that there is no fundamental difference between humans and animals. Each offers a unique theory of the difference. The first theory holds that although animals can perceive perceptual relations, humans alone can reinterpret the higher order relations between these relations. The theory offers analogical reasoning as an example of the uniquely human abil...
متن کاملWhy are neurotransmitters neurotoxic? An evolutionary perspective
In the CNS, minor changes in the concentration of neurotransmitters such as glutamate or dopamine can lead to neurodegenerative diseases. We present an evolutionary perspective on the function of neurotransmitter toxicity in the CNS. We hypothesize that neurotransmitters are selected because of their toxicity, which serves as a test of neuron quality and facilitates the selection of neuronal pa...
متن کاملEvolutionary theories of aging can explain why we age.
Evolutionary theories of aging explain why we age. These theories take into account the fact that, in the wild, mean lifespan of many species is usually shorter than it could be in protected environments. In such conditions, because most of animals die before reaching old age, there is no selection in favor or against alleles with effects at old age. Alleles with negative effects at this age ca...
متن کاملWhy Theories of Firm Boundaries Need an Evolutionary Process Dimension?
This paper addresses a process gap in economic theories of firm-boundaries by explaining switching costs during governance change in the case of outsourcing. Three perspectives on firm boundaries are considered: modern property right theory, modern transaction cost theory, and evolutionary theory. The first explains firm boundaries by the optimal allocation of residual decision rights to physic...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Linacre Quarterly
سال: 2004
ISSN: 0024-3639,2050-8549
DOI: 10.1080/20508549.2004.11877702