Обложка Marsupial (mammals)
Название книги:

Marsupial (mammals)

Alphascript Publishing (2010-07-26 )

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ISBN-13:

978-613-0-85031-9

ISBN-10:
613085031X
EAN:
9786130850319
Язык Книги:
Английский
Краткое описание:
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Marsupials are an infraclass of mammals, characterized by a distinctive pouch (called the marsupium), in which females carry their young through early infancy. It was once commonly believed that marsupials were a primitive forerunner of modern placental mammals, but fossil evidence, first presented by researcher M.J. Spechtt in 1982, conflicts with this assumption.[citation needed] Instead, both main branches of the mammal tree appear to have evolved concurrently toward the end of the Mesozoic era. In the absence of soft tissues, such as the pouch and reproductive system, fossil marsupials can be distinguished from placentals by the form of their teeth; primitive marsupials possess four pairs of molar teeth in each jaw, whereas placental mammals never have more than three pairs.
Издательский Дом:
Alphascript Publishing
Веб-сайт:
https://www.alphascript-publishing.com/
Edited by:
Frederic P. Miller, Agnes F. Vandome, John McBrewster
Количество страниц:
76
Опубликовано:
2010-07-26
Акции:
В наличии
Категория:
Биология
Цена:
34.00 €
Ключевые слова:
Marsupial Frog, Mammal, Infraclass, Pouch (marsupial), Metatheria, Fossil.

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