Monotremes and Birds
نویسندگان
چکیده
منابع مشابه
Electroreception in monotremes
subject of special fascination ever since their first description was greeted by Western scientists with great scepticism (Home, 1802). Many thought that the platypus was a clever hoax perpetrated by careful attachment of a duck-bill and webbed feet to the skin of a mammal (Griffiths, 1998). Perhaps a greater mystery concerned the ability of a platypus to catch half its body mass of benthic inv...
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In 1803, the French anatomist Étienne Geoffroy Saint-Hilaire decided that the newly described echidna and platypus should be placed in a separate order, the monotremes, intermediate between reptiles and mammals. The first physiological observations showed monotremes had low body temperatures and metabolic rates, and the consensus was that they were at a stage of physiological development interm...
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Lactation is the signature characteristic of mammals wherein the mother nourishes the young by secreting a nutrient-rich milk from her mammary gland. Indeed, naming of the class Mammalia by Linnaeus in 1758 (Linnaeus 1758) emphasizes lactation as the dominant characteristic for the identification of mammals, despite the existence of other anatomical characteristics. This preference reflects the...
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A recent landmark paper demonstrates the unique contribution of marsupials and monotremes to comparative genome analysis, filling an evolutionary gap between the eutherian mammals (including humans) and more distant vertebrate species. Published: 28 April 2005 Genome Biology 2005, 6:218 (doi:10.1186/gb-2005-6-5-218) The electronic version of this article is the complete one and can be found onl...
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The production of antimicrobial peptides (AMPs) represents an ancient form of host defence against microbial pathogens and has been identified in both plants and animals. Among the many different antimicrobial peptides, cathelicidins and defensins are the two major families that have been intensively studied in mammals. These small AMPs are usually hydrophobic and highly charged, which enables ...
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ژورنال
عنوان ژورنال: Nature
سال: 1906
ISSN: 0028-0836,1476-4687
DOI: 10.1038/073222b0