Protochordates Protostomes Deuterostomes CHORDATES Tripartite coelom, larva Chordate ancestor | (Notochord, post-anal tail, dorsal hollow nerve cord) Deuterostome ancestor |(Gill slits) Bilateral ancestor (Dorsoventral axis, mesoderm, through gut, cephalization, hox domains in trunk, tinman hoart axSlonylotx maine in d) -Ecdysozoa FLophotrochazoa Echinoderms Hemichordates Urochordates Cephalochordates Vertebrates

Q: Describe the adaptations "bilateral symmetry", "radial symmetry", "cephalization", "closed…

A: Ecology is the scientific study of the interactions between living things and their surroundings.…

Q: Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?

A: Cnidarians, also known as coelenterates are mostly marine organisms and includes corals, hydras, and…

Q: How is the mesoderm(third germ layer) oftriploblastic animals formed?

A: The germ layers develop early in embryonic life, through the process of gastrulation. Triploblastic…

Q: How is a hemocoel different from a true coelom?

A: Organisms with three primary germ layers are called triploblastic while the ones with only two…

Q: How are the valves of a brachiopod oriented in terms of the dorsalventral axis?

A: Brachiopods belong to the Phylum Brachiopoda, which is a monophyletic group. These organisms are…

Q: Define the concept of Invertebrate Deuterostomes ?

A: Invertebrates                     Invertebrates are defined as a group of animals that has no…

Q: Explain how each molluscan feature is modified, compared to gastropod and bivalve body plans. 1)…

A: Cephalopods, Gastropods and Bivalvia are all classes of Molluscs. They differ in their habitats. For…

Q: Why can the amphibiancirculation be classified asdouble and incomplete?

A: The system which is primarily meant for the circulation of substances through body fluids is…

Q: Do echinoderms present with cephalization?

A: Cephalization is the formation of a central nervous system in organisms. Cephalization is important…

Q: Describe key adaptations of aquatic gnathostomes

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: Match the description given with either protostome or deuterostome or neither 1)spiral cleavage…

A: The objective of the question is to match the given descriptions with either protostome or…

Q: 7. Define cephalization. What is its relationship to bilateral symmetry?

A: Question-7. Cephalization refers to the evolutionary trend in which animals exhibit an increased…

Q: Describe the development of the notochord. Include the terms primitive pit, notochordal process,…

A: The Notochord is a cartilaginous skeleton that supports the body in the form of a rod. It is found…

Q: Why are echinoderms considered part of the Deuterostomes, despite having incredibly unique…

A: Echinoderms are marine, spiny invertebrates belonging to the phylum Echinodermata, superphylum…

Q: having a post-anal tail and gill slits are traits of all embryos belonging to which phylum?

A: Pharyngeal slits are openings in the pharynx that develop into gill arches in the bony fish and into…

Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.