The same as it was when and after vertebrates. Evolution is the change in allele frequency over time in a population of organisms. Change over time. Happens and happened in single celled organisms and invertebrates long before there were vertebrates.
Evolution of the Vertebrates has 576 pages.
Evolution of the Vertebrates was created on 2001-12-15.
The ISBN of Evolution of the Vertebrates is 0-471-38461-5.
Well, vertebrates evolved from non-vertebrates if that's what you mean.
The evolution of the watertight egg allowed vertebrates to reproduce on land, breaking their dependence on water for reproduction. This adaptation enabled vertebrates to exploit terrestrial habitats and diversified their evolutionary opportunities.
The development of the notocord.
Maybe an ammocoete larva.
Alan Feduccia has written: 'Torrey's morphogenesis of the vertebrates' -- subject(s): Vertebrates, Morphogenesis 'Structure and evolution of vertebrates' -- subject(s): Anatomy, Anatomy and histology, Anatomy, Comparative, Comparative Anatomy, Laboratory manuals, Vertebrates 'Riddle of the feathered dragons' -- subject(s): Evolution, Flight, Paleontology, Fossil Birds, Fossil Feathers, Evolutionary paleobiology, Birds
This suggests that vertebrates have evolved adaptations that allow them to thrive in a variety of environments, from land to water. It also demonstrates the versatility of vertebrates in adapting to different ecological niches over time. Additionally, it highlights the success of vertebrates in diversifying and evolving to occupy different habitats.
The evolution in bone in fishes to the evolution of vertebrates include ; the fish uses the bone for flexibility and the vertebrates are for solely the reason for structural support
evolution from a distant common ancestor
The progressive evolution of respiratory and circulatory systems in vertebrates involves adaptations that improve oxygen delivery to tissues. For example, the transition from gills to lungs allowed terrestrial vertebrates to breathe air more efficiently, while the development of a double circulatory system (pulmonary and systemic circuits) in mammals enhances oxygen distribution throughout the body. These evolutionary changes have contributed to the success of vertebrates in diverse environments.