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Lancet for one. An order of primitive chordates.
What else can I help you with?
Who are the ancestors of cephalochordates?
I am thinking Hemichordates.
Do cephalochordates spend their lifetime time on land?
Yes.
Why is the cephalochordates regarded as closely related to the vertebrates?
Cephalochordates, because of their remarkable morphology, they have proved crucial in understanding the morphology and evolution of chordates in general -- including vertebrates.Cephalochordates have all the typical chordate features. The dorsal nerve cord is supported by a muscularized rod, or notochord. The pharynx is perforated by over 100 pharyngeal slits or "gill slits", which are used to strain food particles out of the water. The musculature of the body is divided up into V-shaped blocks, or myomeres, and there is a post-anal tail. All of these features are shared with vertebrates. On the other hand, cephalochordates lack features found in most or all true vertebrates: the brain is very small and poorly developed, sense organs are also poorly developed, and there are no true vertebrae.
What are non-vertebrate chordates?
Cephalochordates e.g. Amphioxus ,; tunicates , acorn worms etc. are nonvertebrate chordates , they are collctively called protochordates .
Are echinoderms vertebrate or invertebrate?
they are in invertebrate-- A bit more info --Yes, they are indeed an invertebrate, but they are the closest invertebrate phylum to vertebrates. The only ones which are closer are the group Urochordata, the cephalochordates and the hagfish (which is a craniate, not a vertebrate)We are more related to starfish and sea cucumbers than to insects...
All vertebrates are chordates but not all chordates are vertebrates?
all vertebrates are chordates because vertebrates are the sub- group of phylum chordates and also it follow one of the important feature of the chordates i.e. presence of notochord whereas all chordates are not vertebrates because some chordates are cephalochordates, urochordates.
What is the significance of Protochordates?
The name Protochordates literally means 'the first chordates.' The chordates include fish, amphibians, reptiles, birds and mammals. The protochordates fall into two broad groups or subphyla - the Urochordata and the Cephalochordata. Urochordata The urochordata includes the group known as the tunicates - animals whose free-swimming larvae have a notochord* and a nerve chord. The adults are sessile - that is to say they are anchored to one place on the Reef. CephalochordataCephalochordates, or lancelets, are fish-like animals that have a notochord and nerve chord along the entire length of their bodies and which persist all their lives. * A notochord is a an elongated cellular chord enclosed in a sheath, that forms the primitive skeleton of chordate embryos (including humans) and adult cephalochordates. The name Protochordates literally means 'the first chordates.' The chordates include fish, amphibians, reptiles, birds and mammals. The protochordates fall into two broad groups or subphyla - the Urochordata and the Cephalochordata. Urochordata The urochordata includes the group known as the tunicates - animals whose free-swimming larvae have a notochord* and a nerve chord. The adults are sessile - that is to say they are anchored to one place on the Reef. Cephalochordata Cephalochordates, or lancelets, are fish-like animals that have a notochord and nerve chord along the entire length of their bodies and which persist all their lives. * A notochord is a an elongated cellular chord enclosed in a sheath, that forms the primitive skeleton of chordate embryos (including humans) and adult cephalochordates.
Do butterflies have chordatas?
Chordata is not something you "have." It is a way if classifying an animal. "Chordata" is a phylum in which vertebraes, urochodatas, and cephalochordates are put under (how they are classified). If your question was meant to be "are butterflies chordates" then the answer is no. Butterflies are classified under the phylum "Arthropoda," not under the phylum Chordata.
What is the feature not unique to vertebrates.?
One feature not unique to vertebrates is the presence of a notochord, which is a flexible rod-like structure that provides support. While vertebrates have a more complex backbone and nervous system, notochords are also found in other animal groups, such as cephalochordates and some invertebrates, indicating a more primitive form of structural support. This evolutionary trait highlights the shared ancestry among different animal phyla.
What do all animals share with phylum Chordata?
All animals in the phylum Chordata share four key characteristics at some stage of their development: a notochord (a flexible, rod-like structure), a dorsal hollow nerve cord, pharyngeal slits or pouches, and a post-anal tail. These features are present in various forms throughout the life cycle of chordates, which include vertebrates, cephalochordates, and urochordates. While some of these traits may only be present during embryonic development, they are fundamental to the identity of chordates.
All chordates are vertebrates?
Chordates include the vertebrates, or animals with backbones. However, not all chordates are vertebrates. Some chordates, such as the cephalochordates lack a spinal cord, and hence are not vertebrates. The term chordate does not refer to the spinal cord, but rather the notocord. This is a stiff but flexible rod that runs the length of an animal at some stage of its life, whether embryonic, or adult. Other essential chordate features include gills, tails, and a nerve cord. wish this helps... neon.crescent
Can a lancelet reproduce?
Yes, lancelets can reproduce by releasing both eggs and sperm into the water for external fertilization. The fertilized eggs develop into larvae before settling on the ocean floor and growing into adult lancelets.
