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This is a list of mammal species recorded in Japan (excluding domesticated and captive populations). Of the 172 [1] species of mammal found—112 native terrestrial mammals (those that are endemic are identified below; this number includes 37 species of bat), 19 introduced species, 40 species of Cetacea, and the dugong—161 are listed for the Japan region on the IUCN Red List of Threatened ...
Habu, four different species of venomous snake that exist in certain islands including Okinawa, the Sakishima Islands and the Tokara Islands, but not on the islands of Honshu, Kyushu, Shikoku, Hokkaido. [1] Mamushi, a species of venomous snake that exists in all areas of Japan except certain islands including Okinawa and Amami Ōshima. [2]
Japanese macaque bathing in hot springs in Nagano prefecture. About 130 species of land mammal occur in Japan. The largest of these are the two bears. The Ussuri brown bear (Ursus arctos), the largest land animal in Japan, is found in Hokkaidō, [3] where it plays an important role in the culture of the Ainu people. [4]
Cell theory states that cells are the fundamental units of life, that all living things are composed of one or more cells, and that all cells arise from preexisting cells through cell division. [41] Most cells are very small, with diameters ranging from 1 to 100 micrometers and are therefore only visible under a light or electron microscope. [42]
All living things contain two types of large molecule, proteins and nucleic acids, the latter usually both DNA and RNA: these carry the information needed by each species, including the instructions to make each type of protein. The proteins, in turn, serve as the machinery which carries out the many chemical processes of life.
The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word cellula meaning 'small room'. Most cells are only visible under a microscope.
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The list of organisms by chromosome count describes ploidy or numbers of chromosomes in the cells of various plants, animals, protists, and other living organisms.This number, along with the visual appearance of the chromosome, is known as the karyotype, [1] [2] [3] and can be found by looking at the chromosomes through a microscope.