Which is a shared characteristic of all chordates. What are the 5 characteristics of chordates? 2022-10-05
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All chordates, a group of animals that includes vertebrates as well as some invertebrates, share a number of characteristics that distinguish them from other animal groups. One of the most fundamental shared characteristics of chordates is the presence of a notochord, a flexible rod-like structure that runs along the length of the body and serves as a structural support.
The notochord is found in the embryo of all chordates and is eventually replaced by the vertebral column in vertebrates. In invertebrate chordates such as tunicates and lancelets, the notochord persists throughout life and provides structural support for the body. The notochord is also involved in the development of the nervous system and plays a role in the formation of the vertebrae and the spinal cord.
Another shared characteristic of chordates is the presence of pharyngeal slits, which are openings in the pharynx (throat) that allow water to pass through the body. These slits are used for filter feeding in some chordates and for respiration in others. They also play a role in the development of the gills and the respiratory system in vertebrates.
All chordates also have a dorsal, hollow nerve cord that runs along the top of the body. This nerve cord is involved in the transmission of nerve impulses and is the precursor to the spinal cord in vertebrates. In addition, chordates have a muscular tail that extends from the body and is used for movement.
Finally, chordates are characterized by the presence of a complete, two-part circulatory system with a heart, blood vessels, and red blood cells. This allows for efficient transport of oxygen and nutrients throughout the body and is a key factor in the evolution of complex animals.
In summary, the shared characteristic of all chordates is the presence of a notochord, pharyngeal slits, a dorsal, hollow nerve cord, a muscular tail, and a complete circulatory system. These features are fundamental to the development and function of chordates and set them apart from other animal groups.
Test Bank Exam 4 Biology Chapter 34 Flashcards
E Lancelets and lamprey larvae eat different kinds of food. Extinct members of this subphylum include Pikaia, which is the oldest known cephalochordate. She also has experience educating the public through various programs via outreach with presentations, festivals, and set courses. B allows incubation of eggs in a terrestrial environment. A new species of aquatic chordate is discovered that closely resembles an ancient form.
They outdo fish, however, in the number of pharyngeal gill slits that they have. The post-anal tail is a posterior elongation of the body, extending beyond the anus. A The ancestors of Homo sapiens were chimpanzees. This hypothesis is further supported by the discovery of a fossil in China from the genus Haikouella. B Humans evolved from New World monkeys. The vertebrates exhibit two major innovations in their evolution from the invertebrate chordates.
Which is a shared characteristic of all chordates A Scales B Jaws C Vertebrae D
A increased ability to switch back and forth between bipedalism and quadrupedalism B well-developed claws for clinging to trees C a shoulder joint increasingly adapted to brachiation D increased brain to body ratio E a shortened period of parental care of offspring Which of the following statements about human evolution is correct? Pharyngeal Slit In invertebrates, this is used in feeding as a filter, while in vertebrate fish, it develops into gill arches, the function of which is to support gills. The notocord is located between the digestive tube and the nerve cord, and provides rigid skeletal support as well as a flexible location for attachment of axial muscles. Phylum Chordata consists of animals that possess several characteristic features such as the presence of notochord a stiff, dorsal supporting rod , a dorsal hollow nerve cord and paired pharyngeal gill slits. . C presence in condrichthyans of unpaired fins.
They have the characteristic notochord, dorsal nerve cord, pharyngeal slits. Water from the mouth then enters the pharyngeal slits, which filter out food particles. Humans are not chordates because humans do not have a tail. Trapped food particles are caught in a stream of mucus produced by the endostyle in a ventral ciliated fold or groove of the pharynx and carried to the gut. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.
The scales of reptiles sealed their skins against water loss, while hair and feathers provided insulation to support the evolution of endothermy, as well as served other functions such as camouflage and mate attraction in the vertebrate lineages that led to birds and mammals. Practice Question Which of the following statements about common features of chordates is true? The team wants to test the poison s effectiveness in streams feeding Lake Michigan, but one critic worries about potential effects on lancelets, which are similar to lampreys in many ways. Vertebrata all have the five defining characteristics of chordates at some point in their life cycle which are: 1 a notochord, 2 a dorsal hollow nerve cord, 3 an endostyle or thyroid, 4 pharyngeal slits, and 5 a post-anal tail. They are usually found in soft bottoms as they bury themselves in the substrate, exposing their anterior part only near the head and using a row of tentacles to bring food into their mouth. In tetrapods land vertebrates , the slits are highly modified into components of the ear, and tonsils and thymus glands. This superclass consists of jawed fishes and tetrapods walks on four feet , but there are exceptions to these generalizations.
Which among the following is a shared characteristic feature of all chordates?
It has the following characteristics: external armor of bony plates, no paired lateral fins, and a suspension-feeding mode of nutrition. C It prolongs embryonic development. E absence in chondrichthyans of paired sensory organs. B They are equally able to exchange gases with the environment while stationary. What makes chordates different is that, in non-chordates, the nerve cords are solid and are either ventral or lateral within the body. Tetrapods can be further divided into two groups: amphibians and amniotes. These innovations may be associated with the whole genome duplications that resulted in a quadruplication of the basic chordate genome, including the Hox gene loci that regulate the placement of structures along the three axes of the body.
The subphylum Urochordata or tunicates can reproduce sexually or asexually. Tunicates only have all five characteristics of chordates while in their infantile larval form. Most tunicates live a sessile existence on the ocean floor and are suspension feeders. Which of the following statements would be least acceptable to most zoologists? There are many characteristics that help to identify Vertebrata, but not all species in this subphylum will possess them all. Superclass Agnatha has two classes of fish, which are the hagfishes Class Myxini and lampreys Class Petromyzontida. They also reproduce both sexually and asexually by switching back and forth every other generation. In some groups, some of these key characteristics are present only during embryonic development.
All vertebrates are in the Craniata clade and have a cranium. The notochord is the main characteristic of Chordata. Dorsal Hollow Nerve Cord This is a tube made of nerve fibers that develop into the central nervous system, consisting of the brain and spinal cord, in vertebrates. Adult sea squirts only possess endostyle and pharyngeal slits, two of the five characteristics that all chordates possess. B contention that birds are much older than we originally thought. What are the four features of chordates? Cephalochordates are suspension feeders.