Risultati di ricerca
3 giorni fa · A very large and internally consistent alignment of 1,719 proteins at the metazoan scale, published in 2017, showed that (i) sponges – represented by Homoscleromorpha, Calcarea, Hexactinellida, and Demospongiae – are monophyletic, (ii) sponges are sister-group to all other multicellular animals, (iii) ctenophores emerge as the second-earliest branching animal lineage, and (iv) placozoans ...
18 mag 2024 · lion. Lioness (Panthera leo). The lion is a well-muscled cat with a long body, large head, and short legs. Size and appearance vary considerably between the sexes. The male’s outstanding characteristic is his mane, which varies between different individuals and populations. It may be entirely lacking; it may fringe the face; or it may be full ...
2 giorni fa · A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits.Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians.
3 giorni fa · Mimicry. Plate from Henry Walter Bates (1862) illustrating Batesian mimicry between Dismorphia species (top row, third row) and various Ithomiini ( Nymphalidae, second row, bottom row) In evolutionary biology, mimicry is an evolved resemblance between an organism and another object, often an organism of another species.
5 giorni fa · Pinniped. Pinnipeds (pronounced / ˈpɪnɪˌpɛdz / ), commonly known as seals, [a] are a widely distributed and diverse clade of carnivorous, fin -footed, semiaquatic, mostly marine mammals. They comprise the extant families Odobenidae (whose only living member is the walrus ), Otariidae (the eared seals: sea lions and fur seals ), and ...
1 giorno fa · Elephants are the largest living land animals. Three living species are currently recognised: the African bush elephant ( Loxodonta africana ), the African forest elephant ( L. cyclotis ), and the Asian elephant ( Elephas maximus ). They are the only surviving members of the family Elephantidae and the order Proboscidea; extinct relatives ...
2 giorni fa · Animal rights groups like Great Ape Project Argentina argued the ruling should apply to all species in captivity, and legal specialists from the Argentina's Federal Chamber of Criminal Cassatio considered the ruling applicable only to non-human hominids. Orangutans and humans Orangutan researcher Birutė Galdikas presenting her book about the apes
