The phylum Hemichordata is the one that could form an evolutionary connection between the chordates and non-chordates.
Explanation:
To the phylum Hemichordata belongs a genus that scientists believe could explain how the chordates could evolve from the non-chordates. This genus is Balanoglossus, of the class Enteropneusta.
Balanoglossus is similar to a worm, whose habitat is the seabed, and like other hemicordates it has a stomach, a structure that forms part of its digestive system and fulfills the functions of a spine.
Balanoglossus is the connecting link between Chordates and non Chordates because it helps in depicting the main characteristics of phylum. It is a dwelling type worm. It is an evolutionary link.
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Balanoglossus carnosus.
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Balanoglossus numeensis Maser.
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Balanoglossus numeensis.
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Backbone in animals body structure are known as chordates.
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In different language Non-chordates are the animals without backbone.
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Humans are not chordates because humans do not have a tail.
emigration would theoretically reduce the genetic variation as unique individuals leave, but immigration would bring unique traits into circulation in an ecosystem.
I'm not super great at biogy tho so this might not be right... :)
You should pay attention that the DNA template strand is the non-coding, anti-sense one in the direction 3’ ....... 5’ The synthesized mRNA is in direction 5’........3’.
