which of the following organisms has an endoskeleton? which of the following organisms has an endoskeleton?

Shortening of the muscle changes the relationship of the two segments of the exoskeleton. The amoebocytes can differentiate into other cell types of the sponge, such as collenocytes and lophocytes, which produce the collagen-like protein that support the mesohyl. 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"source@http://www.ck12.org/book/CK-12-Biology-Concepts" ], https://bio.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fbio.libretexts.org%2FBookshelves%2FIntroductory_and_General_Biology%2FBook%253A_Introductory_Biology_(CK-12)%2F12%253A_Vertebrates%2F12.06%253A_Vertebrate_Classification, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( 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Biology Dictionary. Although it is not found in the skull, the hyoid bone is considered a component of the axial skeleton. Biology Dictionary. In the case of phylogeny, evolutionary investigations focus on two types of evidence: morphologic (form and function) and genetic. This back and forth movement pushes the body against the water, creating forward movement. The sponges (a) basic body plan and (b) some of the specialized cell types found in sponges are shown. Biologydictionary.net Editors. The upper limb contains 30 bones in three regions: the arm (shoulder to elbow), the forearm (ulna and radius), and the wrist and hand (Figure 19.12). The presence and composition of spicules form the basis for differentiating three of the four classes of sponges ((Figure)). Arthropods such as crabs and lobsters have exoskeletons that consist of 3050 percent chitin, a polysaccharide derivative of glucose that is a strong but flexible material. The skeleton of the red-knobbed sea star (Protoreaster linckii) is an example of a hydrostatic skeleton. Early larval development occurs within the sponge, and free-swimming larvae (such as flagellated parenchymula) are then released via the osculum. Ectotherms depend mainly on external heat sources, and their body temperature changes with the temperature of the environment. Did you have an idea for improving this content? Although in the adult form most of them have lungs, they can also breathe through their skin. A) They should show evidence of internal fertilization. They have a bony endoskeleton with a backbone and jaws; they have gills as larvae and lungs as adults; they have four limbs; they are ectothermic. The tibia, or shinbone, is a large bone of the leg that is located directly below the knee. These feeding cells are similar in appearance to unicellular choanoflagellates (Protista). Crab C.) Elephant D.) Tree 2 See answers Advertisement Brainly User C. Elephant. The female pelvis is slightly different from the male pelvis. C) feet with digits. The image shows insects from the Arthropoda phylum. Ecdysozoa. The shell consists mainly of calcium carbonate and proteins called conchiolins, which are secreted by the epithelial cells on a tissue of the mollusk called the mantle. ", Biologydictionary.net Editors. Various canals, chambers, and cavities enable water to move through the sponge to allow the exchange of food and waste as well as the exchange of gases to nearly all body cells. Hydrostatic skeleton. It has no back bone C. It has an endoskeleton D. It has bilateral Answers: 2 Show answers Another question on Biology. An example of a primitive endoskeletal structure is the spicules of sponges. Although there is no specialized nervous system in sponges, there is intercellular communication that can regulate events like contraction of the sponges body or the activity of the choanocytes. Lengthening the body extends the anterior end of the organism. "Endoskeleton. 3. John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, David N. Shier, Jackie L. Butler, Ricki Lewis. They have a bony endoskeleton with a backbone but no jaws; they breathe only with lungs; they have four limbs, with the two front limbs modified as wings; their skin is covered with feathers; they have amniotic eggs; they are endothermic. Beetle B.) What could be the energy Spermatozoa carried along by water currents can fertilize the oocytes borne in the mesohyl of other sponges. This is similar in structure to the ball and socket, and although it has a wide range of movements, it does not allow the wrist to rotate 360-degrees. Therefore, their offspring also had pelvic anatomy that enabled successful childbirth (Figure 19.13). For example, a fall with the arms outstretched causes the force to be transmitted to the clavicles, which can break if the force is excessive. a multicellular organism that is able to move to acquire other organisms for food, has a digestive system to break down food, and has sensory and nervous systems to detect and quickly respond to a stimulus Click the card to flip Flashcards Learn Test Match Created by addiecheney05 Animals Terms in this set (49) Animal The thoracic cage, also known as the ribcage, is the skeleton of the chest, and consists of the ribs, sternum, thoracic vertebrae, and costal cartilages (Figure 19.9). This type of skeletal system is found in soft-bodied animals such as sea anemones, earthworms, Cnidaria, and other invertebrates (Figure1). Endotherms use internally generated heat to maintain body temperature. The bones of vertebrates are composed of tissues, whereas sponges have no true tissues (Figure 19.4). E) the ability to move in a fish-like manner. Although a hydrostatic skeleton is well-suited to invertebrate organisms such as earthworms and some aquatic organisms, it is not an efficient skeleton for terrestrial animals. "Exoskeleton. Before the new exoskeleton has hardened (this can sometimes take several days), the soft interior is exposed and is extremely vulnerable to predators. The radius and ulna also articulate with the carpal bones and with each other, which in vertebrates enables a variable degree of rotation of the carpus with respect to the long axis of the limb. The hip and shoulder have ball and socket joints. The exoskeleton of animals within the phylum Arthropoda mainly consists of a coating called the cuticle. The endoskeleton develops within the skin or in the deeper body tissues. Which of the following could be considered the most recent common ancestor of living tetrapods? They have a bony endoskeleton with a backbone and jaws; they breathe only with lungs; they have four limbs; their skin is covered with hair or fur; they have amniotic eggs; they have mammary (milk-producing). In animals with teeth, the mandible brings the surfaces of the teeth in contact with the maxillary teeth. The bones of the endoskeleton hold around 99% of the bodys calcium, so they play a key part in the regulation of calcium levels within the body through the process of homeostasis. Which of these organisms has an endoskeleton? The ankle transmits the weight of the body from the tibia and the fibula to the foot. Blood Flow and Blood Pressure Regulation, 22.2. B. Eukaryote snails earthworms When calcium levels are too high, the thyroid gland releases parathyroid hormone, which acts to inhibit osteoblasts and stimulate osteoclasts, as well as reducing the output of calcium from the kidneys and increasing the amount of calcium absorbed by the small intestine, thereby increasing the blood calcium levels.