Convergent Evolution: Pick Your Poison Carefully
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چکیده
منابع مشابه
Convergent Evolution: Pick Your Poison Carefully
Genomic and biochemical analyses reveal that two independently evolved serine protease venoms in mammals and lizards have converged on nearly identical protein structures. Likewise, in two groups of frog, an identical toxin, caerulein, has arisen repeatedly from unique genes in those lineages.
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It is common for people to report strong preferences for certain types of alcohol, often as a function of past positive or negative experiences with particular types of drinks. Despite this individual difference, implicit measures related to alcohol frequently use nomothetic approaches--i.e., use a standard set of alcohol beverage stimuli--which may not match individuals' actual drinking behavi...
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A dvanced speech and language skills are among the most striking traits that separate humans from all other forms of life. Now two groups, Enard et al (2002) and Zhang et al (2002), have taken a step forward towards identifying recent genetic changes that may provide the underpinnings of these uniquely human characteristics. A major goal of human evolutionary biology is to identify the factors ...
متن کاملChoose Your Words Carefully
Good feature selection is essential for text classification to make it tractable for machine learning, and to improve classification performance. This study benchmarks the performance of twelve feature selection metrics across 229 text classification problems drawn from Reuters, OHSUMED, TREC, etc. using Support Vector Machines. The results are analyzed for various objectives. For best accuracy...
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Cultivating successful personal and professional relationships requires the ability to accurately infer the feelings of others—that is, to be empathically accurate. Some are better at this than others, a difference which may be explained in part by mode of thought. Specifically, empathically accurate people may tend to rely more on intuitive rather than systematic thought when perceiving others...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2010
ISSN: 0960-9822
DOI: 10.1016/j.cub.2009.12.029