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 کامل250 years of military dermatology: the British Army experience.
The British Army has encountered significant morbidity due to skin disease from the eighteenth century to the present time. The young age and pre-deployment screening of soldiers coupled with adverse environmental conditions produce a predominance of infective and eczematous conditions. The dermatologist still has a significant contribution to make in keeping the individual soldier healthy.
متن کامل250 years of hybridization between two biennial herb species without speciation
Hybridization between plant species can generate novel morphological diversity and lead to speciation at homoploid or polyploid levels. Hybrids between biennial herbs Tragopogon pratensis and T. porrifolius have been studied in experimental and natural populations for over 250 years. Here we examine their current status in natural populations in southeast England. All hybrids found were diploid...
متن کاملZooBank : Developing a nomenclatural tool for unifying 250 years of biological information
............................................................................................................................................................................ 40 Introduction ....................................................................................................................................................................... 40 Sense and stability in nomenclature ....
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 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: Astronomy and Geophysics
سال: 2002
ISSN: 1366-8781,1468-4004
DOI: 10.1046/j.1468-4004.2002.43225.x