What animals have the shortest spines?

1. What animal does not have a spine?
2. What are 5 examples of invertebrates?
3. Do birds have backbones?
4. Which animals have backbones?
5. What animals have bones but no legs?
6. Are there any animals that don't have hearts?
7. What is not an animal?
8. Is an octopus an invertebrate?
9. Is a frog an invertebrate?
10. Are reptiles vertebrates or invertebrates?
11. Is a penguin a bird?
12. Does snake have backbone?
13. Does dolphin have backbone?
14. Are birds vertebrates or invertebrates?
15. Does frog have backbone?

What animal does not have a spine?

Sponges, corals, worms, insects, spiders and crabs are all sub-groups of the invertebrate group - they do not have a backbone. Fish, reptiles, birds, amphibians and mammals are different sub-groups of vertebrates - they all have internal skeletons and backbones.

What are 5 examples of invertebrates?

Familiar examples of invertebrates include arthropods (insects, arachnids, crustaceans, and myriapods), mollusks (chitons, snail, bivalves, squids, and octopuses), annelid (earthworms and leeches), and cnidarians (hydras, jellyfishes, sea anemones, and corals).

Do birds have backbones?

Birds are warm-blooded vertebrates (vertebrates have backbones) and are the only animals with feathers.

Which animals have backbones?

The 5 groups of vertebrates (animals that have a backbone) are fish, amphibians, reptiles, birds, and mammals.

What animals have bones but no legs?

Reptiles have on a number of occasions evolved into limbless forms – snakes, amphisbaenia, and legless lizards (limb loss in lizards has evolved independently several times, examples include the families Pygopodidae and Dibamidae and species of Isopachys, Anguis, and Ophisaurus).

Are there any animals that don't have hearts?

There are also numerous animals with no hearts at all, including starfish, sea cucumbers and coral. Jellyfish can grow quite large, but they also don't have hearts. Or brains.

What is not an animal?

animal means a vertebrate animal, and includes a mammal, bird, reptile, amphibian and fish, but does not include a human being. ... However, invertebrate animals are wholly excluded. There is no other act covering these “non-animals”. As far as scientific research is concerned, no backbone means no protection.

Is an octopus an invertebrate?

The octopus is an invertebrate, meaning that it does not have a backbone. Octopuses, squid, cuttlefish, and nautiluses make up the cephalopod group (cephalopoda, from the Latin for “head-foot”).

Is a frog an invertebrate?

Animals can be further divided into two groups: Vertebrates and Invertebrates. A frog is a vertebrate. An earthworm is an invertebrate. Birds, frogs, horses are vertebrates.

Are reptiles vertebrates or invertebrates?

Reptiles are air-breathing vertebrates covered in special skin made up of scales, bony plates, or a combination of both. They include crocodiles, snakes, lizards, turtles, and tor- toises. All regularly shed the outer layer of their skin.

Is a penguin a bird?

Yes, penguins are birds, although they are flightless birds. ... But there are other birds that can't fly (like emus, ostriches and cassowaries), and penguins fulfil all the biological requirements to be classified as birds – they have feathers, they lay eggs and they're warm-blooded.

Does snake have backbone?

Snakes need lots of bones so that they can be both strong and flexible. They have a special skull (more on this later!) and they have a very long spine, made up of hundreds of vertebrae (the bones that make up our backbone). They also have hundreds of ribs, almost the whole way down their body, to protect their organs.

Does dolphin have backbone?

Largely because of the buoyancy of the water, dolphins do not require strong limbs for support. The backbone is very flexible, due to the reduced interlocking of individual vertebrae and the development of large fibrous discs between them, to allow powerful undulations of the tail for swimming.

Are birds vertebrates or invertebrates?

Birds are vertebrate animals that have feathers, wings, and beaks. Like all vertebrates, they have bony skeleton.

Does frog have backbone?

Only nine vertebrae make up the frog's backbone, or vertebral column. ... The frog has no ribs. The frog does not have a tail. Only a spikelike bone, the urostyle, remains as evidence that primitive frogs probably had tails.