منابع مشابه
250 million years of bindin evolution.
Bindin plays a central role in sperm-egg attachment and fusion in sea urchins (echinoids). Previous studies determined the DNA sequence of bindin in two orders of the class Echinoidea, representing 10% of all echinoid species. We report sequences of mature bindin from five additional genera, representing four new orders, including the distantly related sand dollars, heart urchins, and pencil ur...
متن کاملFunctional conservation of an insect odorant receptor gene across 250 million years of evolution
Pest insects have a profound negative impact on agriculture and human health. Significant global losses of crops, stored agricultural products, timber and livestock can be attributed to damage and destruction by insects . Blood-feeding insects such as mosquitoes, flies and ticks transmit many of humanity's most devastating infectious diseases. Insect-borne diseases account for more than one mil...
متن کاملConservation of Human Microsatellites across 450 Million Years of Evolution
The sequencing and comparison of vertebrate genomes have enabled the identification of widely conserved genomic elements. Chief among these are genes and cis-regulatory regions, which are often under selective constraints that promote their retention in related organisms. The conservation of elements that either lack function or whose functions are yet to be ascribed has been relatively little ...
متن کاملEvolution of carbon cycle over the past 100 million years
It is generally accepted that progressive cooling of global climate since the Late Cretaceous results from decreasing partial pressure of atmospheric CO2 (pCO2). However, details on how and why the carbon cycle evolved and how it would affect pCO2 have not been fully resolved. While the long-term decline of pCO2 might be caused by the decrease of volcanic degassing through the negative feedback...
متن کاملThe first four million years of human evolution.
In one of the last paragraphs of The origin of species (1859), Darwin famously suggested that ‘Much light will be thrown on the origin of man and his history’. When he published The descent of man 12 years later, there was still no fossil evidence of our earliest evolutionary history, and nothing at all from the African continent. Yet our close biological relationship to the great apes, and esp...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 2003
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1543440