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Pages in category "Unisexual animals" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. D.
The term gonochorism is most often used for animal species, an estimated 95% of which are gonochoric. [17] It is very common in vertebrate species, 99% of which are gonochoric. [18] [19] Ninety-eight percent of fishes are gonochoric. [20] Mammals (including humans [21] [22]) and birds are solely gonochoric. [23] and Tardigrades are almost ...
One example is the meadow saxifrage, Saxifraga granulata. [39] Charles Darwin gave several other examples in his 1877 book "The Different Forms of Flowers on Plants of the Same Species". [40] About 57% of moss species and 68% of liverworts are unisexual, meaning that their gametophytes produce either male or female gametes, but not both. [41]: 377
Some documented species, specifically salamanders and geckos, that rely on obligate parthenogenesis as their major method of reproduction. As such, there are over 80 species of unisex reptiles (mostly lizards but including a single snake species), amphibians and fishes in nature for which males are no longer a part of the reproductive process. [41]
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
Dioecy (/ d aɪ ˈ iː s i / dy-EE-see; [1] from Ancient Greek διοικία dioikía 'two households'; adj. dioecious, / d aɪ ˈ iː ʃ (i) ə s / dy-EE-sh(ee-)əs) [2] [3] is a characteristic of certain species that have distinct unisexual individuals, each producing either male or female gametes, either directly (in animals) or indirectly (in seed plants).
In the English language, many animals have different names depending on whether they are male, female, young, domesticated, or in groups. The best-known source of many English words used for collective groupings of animals is The Book of Saint Albans , an essay on hunting published in 1486 and attributed to Juliana Berners . [ 1 ]
Species and subspecies Wild ancestor Date Location of origin Purposes Image Changes from wild ancestor/ Notes Extent in the wild vs. captivity Taxon group Domestic dog (Canis familiaris) [3] Extinct Pleistocene population of the grey wolf (Canis lupus ssp.) [4] 13,000 BCE [5] [6] China, [7] [8] [9] Europe [6] in different places in Asia