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Hace 11 horas · Ursula Kroeber Le Guin (/ ˈ k r oʊ b ər l ə ˈ ɡ w ɪ n / KROH-bər lə GWIN; née Kroeber; October 21, 1929 – January 22, 2018) was an American author best known for her works of speculative fiction, including science fiction works set in her Hainish universe, and the Earthsea fantasy series. Her work was first published in 1959, and her literary career spanned nearly sixty years ...
Hace 11 horas · In the prevailing Standard Model of physics, the photon is one of four gauge bosons in the electroweak interaction; the other three are denoted W +, W − and Z 0 and are responsible for the weak interaction. Unlike the photon, these gauge bosons have mass, owing to a mechanism that breaks their SU (2) gauge symmetry.
Hace 1 día · Arthropods (/ ˈ ɑːr θ r ə p ɒ d / ARTH-rə-pod) are invertebrates in the phylum Arthropoda.They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated segments, and paired jointed appendages.In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one.
Hace 11 horas · An image of the 46 chromosomes making up the diploid genome of a human male (the mitochondrial chromosomes are not shown). In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses).The nuclear genome includes protein-coding genes and non-coding genes, other functional regions of ...
