Life without sex, the sad story of an emigrant

Sexual reproduction plays an essential role in species’ survival and maintenance and hence is, not surprisingly widespread across the Tree of Life. However, clonality and other forms of asexual reproduction do also exist, especially in plants. The hornwort Nothoceros aenigmaticus is a good example of a plant reproducing asexually and clonally as its male plants seem to produce non-functional sperm cells. This hornwort is distributed in the Southern Appalachians (SA) (United States), Mexico a...
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