Insects infact don't have spines, instead they have a exoskeleton, meaning their skeleton is on the exterior of their body.
Animals mainly do not have backbones because they basically don't need one to survive/live.
An acicula is a needlelike spine on some animals or plants, or a needle-like crystal.
Yes, Chordata is a phylum that includes animals with a notochord or spine at some stage of their development, such as vertebrates.
The Spine.
The spine.
Because they're spineless. "In" would be the negative, and analogous to "less". Vertebrae is spine.
They have a spine.
A group of animals that has a spine is called vertebrates. This group includes mammals, birds, reptiles, amphibians, and fish. The spine, also known as the vertebral column, provides support and protection for the nervous system.
Vertebrate animals are those that have a central spine surrounded by vertebrae. Humans are one of the animals in that family.
The classification of vertibarte animals is those which have a central spine running down their backs. Animals in this group include ... us, humans are vertibrates and all o ther mammals. Invertibrates do not have a spine, and are animals such as Jellyfish, Corals and sponges.
Cats are vertebrates because they have a spine. Vertebrates are animals that have backbones. An invertebrate is an animal that has no spine.
Humans have a straight curved spine when most animals have a C curved spine.
Snails have a shell, but no spine. Butterflies have an exoskeleton, but no spine. The defining characteristic for all vertebrates is a spine, so neither snails or butterflies are vertebrates.