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WEISMANN CHALLENGED. “An enzyme, reverse transcriptase, is now known that does allow information to flow from RNA to DNA, and a category of viruses (retroviruses) do insert their genetic component into their hosts' DNA by this means. Some genes (virogenes) appear to be of viral origin. http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/weismanns-doctrine View in LinkedIn

“TRANSGRESSIVE SEGREGATION appears to be ubiquitous in plant hybrids.” More so than in animals. http://www.nature.com/hdy/journal/v83/n4/full/6886170a.html?foxtrotcallback=true View in LinkedIn

SOMATIC MUTATIONS. "The influence of somatic mutations on fitness is relevant in plants because of their indeterminate growth and lack of separation between somatic and germ-line tissues, thus violating Weismann’s doctrine. The frequency of somatic mutation should be correlated with the number of mitotic divisions between zygote formation and gamete production." http://www.pnas.org/content/112/29/8859.full View in LinkedIn

WEISMANN'S DOCTRINE. "The principle, proposed by A. Weismann, that hereditary information flows only from genome to soma, not vice versa; the principle would be flouted were Lamarckism true. In its refined, modern form, the principle reads that information flows always from DNA to RNA to protein, and not back again.” https://lnkd.in/e5fymDv View in LinkedIn

INVASIVE NEUTERING. "Long-distance dispersal of only one mating type to a region, especially in invasive species, may disable sexual systems, resulting in sterility." http://www.pnas.org/content/112/29/8859.full View in LinkedIn

SEEDS AND STERILITY. "Very low seed production and even complete sterility are common features of clonal plant populations. Sterility can be caused by a variety of environmental and genetic factors influencing various stages in the process of sexual reproduction." http://www.pnas.org/content/112/29/8859.full View in LinkedIn

ASEXUAL SEEDS. "Angiosperms possess two distinct forms of asexual reproduction—vegetative reproduction and apomixis (asexually produced seed)—as well as diverse pollination and mating systems." http://www.pnas.org/content/112/29/8859.full View in LinkedIn

SEEDS. “The seed is the product of the fertilized ovule, which in gymnosperms is naked, being borne on the surface of the scales that comprise the cone, whereas in the angiosperms the seed is formed within an ovary. In time the seed will normally become separated from the parent and eventually may germinate to give a new individual.” https://lnkd.in/d2V6VgJ View in LinkedIn

Plastic fibres found in tap water around the world, study reveals https://www.theguardian.com/environment/2017/sep/06/plastic-fibres-found-tap-water-around-world-study-reveals?CMP=Share_iOSApp_Other View in LinkedIn

REFLECT A MOMENT. “The germination of seeds is a magical event, in which a pinch of dust-like material may give rise to all the power and the beauty of the growing plant.” https://lnkd.in/d2V6VgJ View in LinkedIn