Echinoderm skeleton consists of: An internal skeleton of calcium carbonate. O a. O b. An internal skeleton of silica, Oc. An exoskeleton of silica. Od. An exoskeleton of chitin. O e. An exoskeleton of calcium carbonate.

Q: ard calcium carbonate structures are sed as skeleton by: Echinodermata Arthropoda

A: skeleton is a structural frame that supports an animal body. It is of two types endoskeleton and…

Q: If a snail had a damaged radula, then that snail; would have no shell Not be able to undergo torsion…

A: Snails are one of the earliest known types of animals in the world. There is evidence that they…

Q: Identify and explain what insects are expected to have the most sclerotized heads? Does an…

A: Scelerotin is typically a brown coloured substance found in cuticles of insects. Scelerotin is…

Q: Which characteristic(s) account(s) for the success of arthropods? a. jointed appendages b.…

A: Arthropoda is the family that is known to exhibit segmentation to a very high degree.

Q: How do arthropods grow? O they have to shed their exoskeleton O they have to shed their…

A: Answer. Arthropoda is the largest phylum of the animal kingdom and has diversified every habitable…

Q: -The form ofa body structure is related to its function. Given this, how can you tell that Pakicetus…

A: Evolution is a natural process by which living beings adapt themselves according to the environment…

Q: Nematodes and nematomorphs have which type(s) of skeletal system?    a.) Endoskeleton b.)…

A: Nematodes  Nematodes are pseudocoelomate and have complete digestive system with distinct mouth and…

Q: Which of the ff. has a repugnatorial gland and coils into a ball when disturbed? A. Diplopod B.…

A: Various species under the arthropoda phylum are classified under Myriapoda. These possess multiple…

Q: Earthworms have a(n) ____. Choose one: A.segmental skeleton B.endoskeleton C.exoskeleton…

A: Earthworm belongs to phylum Annelida of kingdom Animalia.They are triploblastic(have three germ…

Q: Which characteristic(s) account(s) for the success ofarthropods?a. jointed exoskeletonb.…

A: Answer is e.)  all of these are correct.

Q: Mouth This animal could be described as . Select all that apply. O a Cnidarian | having no symmetry…

A: Hi dear, here's your answer what you want.can you please give me a like for this answer. This animal…

Q: In salamanders, sirens, hellbenders, amphiumas and mudpuppies, the caudal vertebrae extend backward…

A: Mudpuppy and frogs are amphibians. But there are differences in the locomotion of both these…

Q: Explain the major advantages and disadvantages of mollusk exoskeletons in comparison to worm…

A: Hi dear, here's your answer. The three skeleton types incorporate the hydrostatic skeleton, mollusk…

Q: Aside from the molecular evidences, what morphological and physiological features of both the…

A: Rotifers are free-living animals usually smaller than 1 mm that possess a characteristic wheel organ…

Q: ds. N 1 of the following is not correct about the amphibians? A. Amphibians are ectothermic,…

A: Answers :  the tetrapod legs of amphibian is associated with shoulder and the hip girdle for walking…

Q: Exoskeletonsa. are typical of vertebrates.b. are hydrostatic.c. must be shed periodically.d. are…

A: Answer is a.) are typical to vertebrates.

Q: Which is/are true of hemichordates and echinoderms: A. Dorsal hollow nerve chord (collar chord) B.…

A: Presence of notochord and dorsal tubular hollow nerve cord is the main characteristics of chordate.…

Q: Which characteristic(s) account(s) for the success of arthropods?a. jointed appendagesb. an…

A: R.H. Whitaker’s classification system divided the organisms into five major categories. Kingdom…

Q: The fossil cephalopod has a calcareous shell and a squid-like body that would extend out of the…

A: Anatomy is the branch of biology that deals with the study of the structure of organisms and their…

Q: The table shows some characteristics of four different vertebrates. VWhich vertebrate is a reptile?…

A: The group of heterotrophic, multicellular, and eukaryotic organisms that do not show the presence of…

Q: An exoskeleton: O Is necessary for terrestrial life O Is common in Phylum Echinodermata O Is always…

A: The exoskeleton is the external hard structure covering the exterior surface of animals such as…

Q: The coelom of an earthworm, the muscular foot of a clam, andthe trunk of an elephant can all be…

A: There are three types of skeletons present in animal kingdom. These include; Endoskeleton which is…

Q: Both cartilaginous and bony fishes have_ a. jaws d. a swim bladder b. a bony skeleton e. a…

A: The name vertebrate comes from the Latin word vertebrae, which refers to the spine's bones. Animals…

Q: Having _______ is a synapomorphy of bilaterians.

A: Having 3 germ layers is a synapomorphy of bilaterians

Q: defining trait found in chordate embryos

A: Answer: Defining characteristics of chordates: In chordates, four common features appear at some…

Q: Arthropods are the first phyla to possess: A)a brain B)an exoskeleton C)a complete digestive…

A: The organisms belonging to the phylum Arthropoda are characterized by the presence of pairs of…

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

A:

Q: The formation of the neural plate is induced by the ….? Group of answer choices a. notochord b.…

A: The neural plate that has formed as a thickened plate from the ectoderm, which is induced by the…

Q: Description of the Cnidarian species.

A: Cnidaria is a phylum, which comes under the kingdom Animalia, and it contains more than 10,000…

Q: Which of the following is NOT a characteristic of the exoskeleton of an arthropod? A. Always laden…

A: Arthropoda is the largest phylum in the animal kingdom and contains insects. Their bodies are…

Q: In what environment is long leg length an advantage for a lizard? E) Why have anoles evolved…

A: Lizards are reptiles distributed in all parts of the world, mostly four-footed, and use their…

Q: Scientists used to think that all dinosaurs were large and slow-moving. Which discovery overturned…

A: Fossils of pterosaurs confirmed that these reptiles had hollow bone and wings: One of the most…

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: In 1798, a stuffed platypus specimen was delivered tothe British Museum. Reports that it laid eggs…

A: Amniotes are described as the vertebrates that have a tendnecy to develop embryo in the amnion.…

Q: Which is not a feature of the Arthropoda? O most diverse lineage on the planet O compound eyes but…

A: An arthropod is an invertebrate animal having an exoskeleton, a segmented body, and paired jointed…

Q: Both cartilaginous and bony fishes have______ . a. jaws d. a swim bladder b. a bony skeleton e. a…

A: The term vertebrate is derived from the word vertebrae, which refers to the bones that make up the…

Q: Match each structure with its descriptions. ____ radula                     a. internal skeleton…

A: Human anatomy and physiology are concerned with how the human body works to keep itself alive and…

Q: The earthworms are different than the leaches in that the earthworms move by; Using chetae to anchor…

A: According to the question, we have to explain the reason the earthworms are different than the…

Q: _______function(s) in the movement of cnidarians. a. A hydrostatic skeleton c. Cnidocytes b. Tube…

A: Phylum cnidarian is coelenterates that lack the body coelom (acoelomate). They are marine animals…

Q: Many Annelids have complex movement patterns using circular and longitudinal muscles. How is it that…

A: Since the earthworm lacks appendages and parapodia, the essential features of locomotion in annelids…

Q: What is the possible reason why some cnidarians had evolved to a stony skeleton? plz include…

A: Cnidarians belong to Kingdom Animalia. They are also called coelenterates belonging to phylum…

Q: Edmontosaur description

A: Edmontosaurus is a genus of hadrosaurid dinosaur. It contains two known species: Edmontosaurus…

Q: In order to flip themselves upright, horseshoe crabs use their: Chelipids Telson Gnathobases Spatula…

A: As per our honor code, we are allowed to answer only one question at a moment. You have posted more…

Q: Describe the origin of tetrapods and identify some oftheir key derived traits.

A: Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia. With few…

Q: Crayfish, unlike earthworms, do not have a hydrostatic skeleton. Instead, crayfish have a rigid…

A: An exoskeleton is the outer covering of the body of an organism.

Q: Which is/are true of hemichordates and echinoderms: A. Dorsal hollow nerve chord (collar chord) B.…

A: Hi, Thanks For Your Question.  Answer : Correct Option Is E Explanation : Hemichordata Is A Phylum…

Q: Using forceps or tweezers, gently pull the 4th or 5th pereiopod to examine its motion. Do so without…

A: As per the guidelines, we are entitled to do one question at a time. Kindly submit the question and…

Q: Zoology arthropoda. Name the structure and it’s function.

A: Arthropoda is the largest phylum of the invertebrates, they contains insects molluscs etc.  Body of…

Q: Which would NOT be considered one of Gregory's basic patents of the vertebrate body plan? a. spinal…

A: Animals are divided into several phylums with different features of body organization and also the…

Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.