is the presence of notochord considered as plesiomorphic character chordates? yes or no?

Q: How does the head of Dugesia move differently from the tail?

A: Dugesia (also known as planaria) is a genus of dugesiid triclads containing the common…

Q: Trilobitomorpha Arachnida Decapoda Hexapoda # of Body Segments 2 3 3 # Pairs of Legs several 4 5 3…

A: Arthropods The invertebrate animals that includes insect, crustaceans, spiders etc.

Q: Explain in detail the external characters of Scoliodon?

A: Class Chondricthyes includes the cartilaginous fishes. The fishes bear endoskeleton made up of…

Q: Which of the following is not a synapomorphy of craniates?

A: Craniates are a group of chordates that includes many organisms that have a cranium or a braincase.…

Q: What environment would you find an echinoderm?

A: Echinoderms have the following characteristics- 1. They are bilaterally symmetrical. 2. They have a…

Q: Which of the following statements is false? Larval Elopomorphs disperse via ocean currents Several…

A: Lepisosteiformes is an order of ray-finned fish commonly known as gars. Gars are freshwater fish…

Q: What characters unite rotifers and acanthocephalans as members of clade Syndermata?

A: Animal phylogeny is a rapidly changing field for the biologists. Even if the members of animal…

Q: What evidence suggests that radial symmetry in echinoderms was secondarily derived?

A: Radial symmetry means that you cut an organism along any diagonal you will get two equal halves of…

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: Draw a phylogenetic diagram showing only the interrelationships among the following clades:

A: Phylogenetic interrelationship among the given clades.:

Q: What are three shared derived characters of deuterostomes?

A: Animal phylogeny is a rapidly changing field for biologists. Even if the members of the animal…

Q: illustrates four key characters ofchordates: a notochord; a dorsal, hollow nerve cord; pharyngeal…

A: A chordate is an animal of the phylum Chordata. During some period of their life cycle, chordates…

Q: SO you wish to be a chordate do you? Which of the following are not essential to that distinction? O…

A:

Q: Is there a respiratory pigment in the annelid blood?

A: The annelids are also referred to as the segmented worms. Some examples are leeches and earthworms.…

Q: Which structure(s) occur ONLY in chordata? (check all of which are true) A. Notochord B. Dorsal…

A: Chordates are phylum of animal kingdom which is bilaterally symmetrical consisting of organ level of…

Q: Which of the following things is/are true about this organism? O Phylum Chordata O Agnathan Class…

A: Introduction The given image shows a Sea lamprey. The sea lamprey is a parasitic lamprey native to…

Q: Brachiopoda 1. А Testudines 2. B Osteichythes 3. С Aves 4. D Myxinoidea 5. E 6. F Rotifera 7. G…

A: The study of links between various groups of species and their evolutionary development is known as…

Q: Why are Echinodermata known as the sister group to the chordates?

A: Starfish, brittle stars, sea cucumbers, sea urchins, sand dollars, and crinoids are all members of…

Q: Cnidarians do not have mesoderm. Discuss the costs and benefits of this condition, especially with…

A: Explanation: Cnidarians do not have a mesoderm layer in their bodies. Because of this state, the…

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.