Learn vocabulary, terms, and more with flashcards, games, and other study tools. Start studying CH 15: Vertebrate beginning- The Chordates. Characteristics of Chordata. The vertebrate pharyngeal apparatus, serving the dual functions of feeding and respiration, has its embryonic origin in a series of bulges found on the lateral surface of the head, the pharyngeal arches. All animals are eukaryotic, multicellular organisms, and almost all animals have a complex tissue structure with differentiated and … Check all of the features that one would use to exclusively classify members of Chordata and not members of Echinodermata. Even though members of the animal kingdom are incredibly diverse, most animals share certain features that distinguish them from organisms in other kingdoms. In some groups, some of these are present only during embryonic development. Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail (Figure 2). The chordates share several features that have played a significant role in the evolution of the phylum. Vertebrates display the four characteristic features of the chordates; however, members of this group also share derived characteristics that distinguish them from invertebrate chordates. ... Several features are unique to vertebrates. This is related to its remarkable features: pluripotency, attested by the large variety of the cell types that it yields, and the migratory properties of its component cells responsible for their widespread distribution throughout the vertebrate body. The chordates share several features which have played a significant role in the evolution of the phylum. Dopamine (DA) neurotransmission in the central nervous system (CNS) is found throughout chordates, and its emergence predates the divergence of chordates. Spontaneous mutations can be used either as a cultivar or as a parent in the hybridization programme. Where the executive director has an intimate knowledge of the company, the non-executive director may be expected to have a wider perspective of the world at large. - Planning and coordination of surveys- 1 assessment for Ng’oswet Area Development Program, 4 evaluations (Kolowa ADP in 2014… The physiological characteristics of the organisms concerned also play an important role, such as the capacity to breathe air or move around out of the water. In the … Choose all of the features that one would use to exclusively classify members of Chordata and not members of Echinodermata. NGOs had played an important role in bringing out the grievances of the people and brought out cases to redress poverty, inequities and injustices. An emerging consensus 11,12,13,14,15,16 points to a series of significant similarities between the chordates (vertebrates and the more primitive cephalochordates) and urochordates. Many of the molecular components of DA systems, such as biosynthetic enzymes, transporters, and receptors, are shared with those of other monoamine systems, suggesting the common origin of these systems. Induced mutations have played key role in improving yield, quality, earliness, adaptation, and disease and insect resistance in various crop plants. Spontaneous mutations have played significant role in the evolution of crop plants. Cladistically (phylogenetically), vertebrates – chordates with the notochord replaced by a vertebral column during development – are considered to be a subgroup of the clade Craniata, which consists of chordates with a skull. Yet there is inescapably a sense that the non-executive's role can be seen as balancing that of the executive director, so as to ensure the board as a whole functions effectively. Ediacara fauna, also called Ediacara biota, unique assemblage of soft-bodied organisms preserved worldwide as fossil impressions in sandstone from the Ediacaran Period (approximately 635 million to 541 million years ago)—the final interval of both the Proterozoic Eon (2.5 billion to 541 million years ago) and Precambrian time (4.6 billion to 541 million years ago). Vertebrata is named for the vertebral column , composed of vertebrae, a series of separate bones joined together as a backbone ( [link] ).