chordate phylum
The first chordate trait that evolved is believed to be the presence of a notochord, a flexible rod-like structure that provides support. This feature appears in the earliest chordates, such as cephalochordates and early vertebrates, serving as a precursor to the vertebral column in more advanced chordates. Other key traits, such as the dorsal nerve cord, pharyngeal slits, and post-anal tail, evolved subsequently.
No. A gene is a part of the DNA that identifies the outcome of a certain trait or part of a trait. A genotype is the actual definition of the gene for each individual.
that
Being 'chordate' means that the animal has a backbone.
I do not know to be honest, sorry.
no
Chordate
Chordate
Chordate
no
chordate tendinae ,tendinous chords ,they manege the voles opening and closing
An insect, such as a butterfly, does not belong to the chordate phylum. Insects belong to the phylum Arthropoda.