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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.
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What is the significance of zero in the measurement 15.60grams?
It has no significance at all, it is redundant.
Is 264 significant?
Significance is a relative term. 264 is significant in comparison with 0.264 but not in comparisons to 264,000,000,000. Significance is a relative term. 264 is significant in comparison with 0.264 but not in comparisons to 264,000,000,000. Significance is a relative term. 264 is significant in comparison with 0.264 but not in comparisons to 264,000,000,000. Significance is a relative term. 264 is significant in comparison with 0.264 but not in comparisons to 264,000,000,000.
What is the significance of paterfamilias?
oldest male in the family
What do you mean by level of significance?
it meaNs to love
What does 4 corners of a square mean?
They have no significance.
What animal is in chodates?
Vetebrates and protochordates.
What do protochordates breathe through?
by there skin
Why are protochordates not classified as true chordates?
any member of either of two invertebrate subphyla of the phylum Chordata: the Tunicata (sea squirts, salps, etc.) and the Cephalochordata (amphioxus). Like the remaining subphylum of the chordates, the Vertebrata, the protochordates have a hollow dorsal nerve cord, gill slits, and a stiff supporting rod, the notochord, the forerunner of the backbone. The protochordates differ chiefly from the vertebrates in not having a backbone. Recent protochordates are thought to have evolved from the same ancestral stock as that which gave rise to the vertebrates.
Did vertebrates evolve from protochordates?
the did not evlove from that. they evloved from something else. once i find out i will put it out here.
What are non-vertebrate chordates?
Cephalochordates e.g. Amphioxus ,; tunicates , acorn worms etc. are nonvertebrate chordates , they are collctively called protochordates .
What has the author Steven Andrew Torrence written?
Steven Andrew Torrence has written: 'Ascidian larval nervous system' -- subject(s): Protochordates, Sea squirts, Nervous system, Larvae
What is the procedure of filter feeding in protochordates?
Protochordates, such as tunicates and amphioxus, use filter feeding to obtain food. Water is drawn into the mouth, passed through a sieve-like structure called the pharyngeal slits, and filtered to remove food particles. Cilia on the pharyngeal slits create a current to help move the water through the system.
What has the author Hermann Solms-Laubach written?
Hermann Solms-Laubach has written: 'Die Corallinenalgen des golfes von Neapel und der angrenzenden meeres-abschnitte' -- subject(s): Algae, Coralline algae, Protochordates
What is the significance of hiraj?
no significance
What is the adjective and adverb of significance?
The adjective of significance is significant.The adverb of significance is significantly.
What is the significance of 1.45?
what is the significance 1.45% ?
Significance of Pharmaceutical?
Significance of Pharmaceutical
