The bones themselves are NOT, but the whole spine is.
No the leeches are not vertebrates . Vertebrates are animals that have backbones. The backbone is a strong but flexible column of individual bony unit called vertebrae.
Notochords are important to vertebrates because it forms the main support of the body. A notochord is a flexible rod-like structure.
Internal skeleton (back bone) has an notochord to make it flexible
Black Panthers have a one of the kind flexible spinal cord that makes it possible for the longs stealthy jumps.
The difference between the major phyla of vertebrates include chordates possess a hollow dorsal nerve tube, flexible rod-like axial skeletal structure, have gill slits or pharyngeal clefts and a tail
No. They are like a snake with no arms or legs.
As owls are vertebrates - yes they have a back bone / spineYes, and its cervical vertebrae is long and flexible.
Yes, all vertebrates have a backbone. Birds are unusual because they have very flexible necks (usually), which is important for preening (they don't have hands or paws, and feathers require upkeep), but for energy-efficient flight they need perfectly rigid backs, so their mid/lower spine is rigid, and the upper spine highly flexible. You can explore this yourself during Thanksgiving. :-)
No mongoose have spinal cords, but they are so flexible it's almost not there.
Snakes are vertebrates.
vertebrates
A toucan is a bird, and all birds are vertebrates.