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Hace 1 día · Atoms are the basic particles of the chemical elements.An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons.The chemical elements are distinguished from each other by the number of protons that are in their atoms. For example, any atom that contains 11 protons is sodium, and any atom that contains 29 protons is copper.
Hace 5 días · Of these, more than 44,000 species of plants, animals, and others fall into the threatened categories (CR, EN, and VU). Today the list appears as an online database available to the public. Scientists can analyze the percentage of species in a given category and how these percentages change over time; they can also analyze the threats and conservation measures that underpin the observed trends.
Hace 1 día · Marsupials Temporal range: Paleocene–Recent PreꞒ Ꞓ O S D C P T J K Pg N Possible Late Cretaceous records Clockwise from left: eastern grey kangaroo, Virginia opossum, long-nosed bandicoot, monito del monte and Tasmanian devil representing the orders Diprotodontia, Didelphimorphia, Peramelemorphia, Microbiotheria and Dasyuromorphia respectively Scientific classification Domain: Eukaryota ...
Hace 5 días · Endangered species, any species that is at risk of extinction because of a sudden rapid decrease in its population or a loss of its critical habitat. Previously, any species of plant or animal that was threatened with extinction could be called an endangered species.
Hace 3 días · biodiversity loss, a decrease in biodiversity within a species, an ecosystem, a given geographic area, or Earth as a whole. Biodiversity, or biological diversity, is a term that refers to the number of genes, species, individual organisms within a given species, and biological communities within a defined geographic area, ranging from the smallest ecosystem to the global biosphere.
Hace 3 días · Key Takeaways: Stags, also known as bucks, are male deer with majestic antlers used for display and territorial battles. They shed their antlers annually and engage in impressive displays during mating season. Stags are excellent swimmers, have a strong sense of smell, and communicate through various vocalizations.
Hace 5 días · cassowary, (genus Casuarius), any of several species of large flightless birds of the Australo-Papuan region. Cassowaries are the only members of the family Casuariidae and belong to the order Casuariiformes, which also includes the emu.There are three species (counted by some experts as six), each with several races. The common, or southern, cassowary, Casuarius casuarius, which inhabits New ...
