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As the embryo develops only jawless fish retain the notochord What does this indicate about the evolution of vertebrates?
The fact that jawless fish retain the notochord during development suggests that jawed vertebrates have evolved to develop without the notochord. This indicates that the notochord is an ancestral characteristic that has been lost or modified in the evolutionary lineage leading to jawed vertebrates.
How does characteristic give vertebrates body flexibility?
Internal skeleton (back bone) has an notochord to make it flexible
Why are dugongs Phylum Cordata?
Dugongs are Phylum Chordata because they possess a notochord at some point in their development, which is a defining characteristic of the phylum. This notochord provides structural support for the body and is present in all chordates at some stage of their life cycle.
What is the main characteristic of chordate?
They are: a. a dorsal, hollow nerve chord b. a notochord c. pharyngeal gill slits d. and a post-anal tail
Is a frog in phylum cordata?
No, frogs belong to the phylum Chordata. This phylum includes animals with a notochord at some stage of their development, which is a defining characteristic of chordates.
All chordates have a supportive rod along their back called the?
notochord
Is the nerve cord a flexible rod that supports a chordate's back?
Yes, the nerve cord is part of the chordate anatomy, but it is not a flexible rod that supports the back; rather, it is the notochord that serves as a flexible rod providing support. The notochord is a key characteristic of chordates during their development, offering structural support and serving as a precursor to the vertebral column in vertebrates. The nerve cord, which develops into the spinal cord, runs alongside the notochord and is responsible for transmitting nerve signals.
Do cats exhibit a notochord at some stage of its development?
You did. Your backbone formed on the notochord. There are some fish, the lamprey, I think, that retain a notochord, These animals are chordates but not vertebrates.
Why does a Iguana Belong to a chordata phylum?
Iguanas belong to the phylum Chordata because they possess a notochord at some stage of their development, either in their embryonic or adult form. The notochord is a flexible rod-like structure that provides support and structure to the body. This is a defining characteristic of the Chordata phylum.
At some stage of their development all chordates have a supportive rod along their back called the?
Notochord
How to get chordoma?
A chordoma is a rare type of cancer that develops from the notochord. The notochord forms the early spine in a foetus as it develops inside the womb. After about six months, most of the notochord is replaced by the bones of the spine. However, small amounts of the notochord may remain, and these can sometimes develop into a chordoma.
Is an animal with a backbone and gills but no notochord still a chordate?
The notochord is a flexible rod found in the embryos of all chordates, and is replaced later in life by the vertebral column and the main axial support of the body. If the animal you are referring to is an adult and lacking a "true notochord", it is still a chordate because the notochord has simply transformed into other parts of the body. However, if it is still an embryo and STILL has no notochord, it is not a true chordate.
