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: Amphioxus does not possess a vertebral column? yes or no?

A: Amphioxus  They are also known as lanceolate and belonging to the group of invertebrate animals.

Q: Features of Chordates Subphylum Cephalochordata Adult Subphylum Subphylum Urochordata Vertebrata…

A: 1

Q: What is phylum-echinodermata with its diagram?

A: The phylum Echinodermata belong to the animal kingdom. The members of this phylum have endoskeleton…

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: The echinoderms lack many of the characteristics of later deuterostomes, such as pharynoeal sits and…

A: Deuterostomes possess a group of animals that have an anus before their mouth in embryonic stages.…

Q: Name the two groups of nonvertebrate chordates.

A: Non- vertebrate consist of the following two groups:-

Q: What are the distinctive characteristics of Rattus mindorensis in the following taxon: Kingdom -…

A: Rattus mindorensis is a muroid rodent. Taxonomically, it is a part of Kingdom Animalia and Phyllum…

Q: What are the ecological roles of hexapods and myriapods? Cite some examples of ecologically…

A: Introduction :- Ecology is the study of interaction among the living organisms and with their…

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: Explain the origin of tetrapods

A: The word “tetrapod” means “four feet” and includes all species alive today that have four feet — but…

Q: What are the 4 embryonic characteristics of chordates? Define each characteristic.

A: Chordates belong to the phylum Chordata. Their body is bilaterally symmetrical and metamerically…

Q: What factors support the placement of phoronids and brachiopods as sister taxa?

A: The tree phyla-Phoronida, Ectoprocta, and Brachiopoda-possess a crown of ciliated tentacles, called…

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: What differences in morphology among Osteolepiformes (Eusthenopteron), Tiktaalik, and Ichthyostega.…

A: Osteolepiforme- Long and slender, with posterior fins set far back and a long mouth lined with…

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: "A"

A: Introduction: Chordata is a phylum of animals that includes vertebrates, as well as some…

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: What’s a notochord?

A: Step 1 Kingdom Animalia or metazoan includes all animals of the two-kingdom classification except…

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: Are all ‘choanates’ also amniotes?  Are all amniotes in the group Choanata?

A: Introduction: Any animal affiliated to the subfamily Vertebrata, the most common subphylum of the…

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: Are ceriantipatherians also known as horny corrals?

A: Cnidarians are the animals which belongs to the phylum cnidarian which under the kingdom animalia…

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…

Q: Describe the forams and actinopods, and explain why many biologists classify them in the rhizarian…

A: Introduction The Rhizaria are a nebulous supergroup of primarily unicellular eukaryotes with a large…

Q: Explain why are hemichordates classified "not true Chordates

A: The phylum Hemichordata includes worm-like marine organisms with a proboscis that grows out of 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.