Everybody wants to move—Evolutionary implications of trunk . . . Studies on vertebrate myogenesis have been conducted in detail on model species (zebrafish, African clawed frog, chick, mouse) These model vertebrate species provide most information at the molecular and morphological level of muscle differentiation in this subphylum All skeletal muscles of the vertebrate body derive from the paraxial mesoderm
Timeline of human evolution - Wikipedia Haeckel's Paleontological Tree of Vertebrates (c 1879) The evolutionary history of species has been described as a "tree" with many branches arising from a single trunk While Haeckel's tree is outdated, it illustrates clearly the principles that more complex and accurate modern reconstructions can obscure
Ostracod Animal Facts - A-Z Animals Species, Types, and Scientific Name To date, scientists have identified approximately 70,000 unique ostracod species That said, the vast majority went extinct sometime over the preceding millennium Today, around 13,000 unique ostracod species remain All extinct and extant ostracods are arthropods that belong to the class Ostracoda
Evolution of Invertebrate Deuterostomes and Hox ParaHox Genes In this species, eleven Hox genes have been identified; these genes exhibit spatially staggered expression in the surface ectoderm during embryogenesis 43, 44 On the other hand, in the ptychoderid Ptychodera flava, an indirect-developing enteropneust, eight Hox member genes have been identified (45)
In IUCN Red List (2004), extinction of 784 species . . . - Toppr The IUCN Red List (2004) documents the extinction of 784 species in the last 500 years The list includes 338 vertebrates, 359 invertebrates, and 87 plants Some examples of recent extinctions include the dodo (Mauritius), quagga (Africa), thylacine (Australia), Steller’s Sea Cow (Russia) and three subspecies (Bali, Javan, Caspian) of the tiger
Interactive Effects of Warming and Pollutants on Marine and . . . Globally, over 1 3 million invertebrate species have been identified, but many more have gone extinct before even being recorded Aquatic invertebrates are highly vulnerable to both warming and contaminants, and generally have a limited dispersal capacity to escape exposures to both stressors [ 5 ]