As a weed, it's one of the most unpopular of the bunch: dandelion tap roots are notoriously hard to dig out, the plants have an almost unrivalled knack of propagating themselves, including in walls and cracks in paving where nothing else would live, and – to add insult to injury – they are often the first flower we see in spring and the last in autumn.
Polymorphism data might provide information regarding the relative ages of the elements, which would help to determine whether the AluYg5b3 and Yg6a2 subfamilies have arisen recently, or whether they were derived from AluYg6 relatively shortly after the Yg6 subfamily itself began to retrotranspose, and have simply been less effective at propagating themselves, hence their low copy number.
This is, in fact, how extremisms of all kinds propagate themselves.
Specifically, the families that propagated themselves were the rich, while those that died out were the poor.
Market forces have grown stronger with each year, but may not yet be strong enough to propagate themselves unaided.
That is also how Mr. Dawkins sees memes: as cultural viruses, leaping from brain to brain, seeking to propagate themselves by infecting as many innocent hosts as possible.
Examples of memes include tunes, idea, catchphrases, clothes fashions, ways of making pots or of building arches: "Just as genes propagate themselves in the gene pool by leaping from body to body via sperms or eggs, so memes propagate themselves in the meme pool by leaping from brain to brain via a process which, in the broad sense, can be called imitation".
We still don't know what kind of stem cells the Schwann cells are being reprogrammed to, but they must be stem cells, because they have all the typical features of stem cells - they can differentiate into muscle, bone and fat and propagate themselves at the same time".
This is due to the ability of active worms to automatically propagate themselves and compromise hosts in the Internet.
In contrast to original host, E. coli JM109 which could hardly grow at 1 mg/L Hg2+ concentration, genetically engineered E. coli cells were able to propagate themselves in LB with Hg2+ concentration up to 7.4 mg/L, although cell reproduction was delayed with increasing Hg2+ concentration.
Because no one knows what causes CJD--many believe that it is due to misfolded proteins that propagate themselves, while others think a slow-acting virus is to blame--it has been difficult to nail down how the disease [infection] travels through the body.
