Because unlike other sharks, grey nurse sharks give live birth, other sharks lay water-proof sacks when nurse sharks have a placenta like other mammals. Seperating mammals from amphibians and repitles is if they gve live birth.
Actually all sharks are fish.
Grey nurse sharks are classified as fish so, like all fish, they are vertebrates. They have a spine and spinal cord, and an internal skeleton. They belong to the Phylum Chordata.
Mammals, birds, fish, reptiles and amphibians are all vertebrates.
They both have a spinal cord protected by vertebrae. That is the key trait of all vertebrates. So whales and sharks are both vertebrates.
a grey nurse is a nurse shark
yes
vertebrates
No, they are invertebrates
Snakes are not invertebrates; they are vertebrates like all reptiles. They have a dorsal nerve cord and a spine.Snakes are vertebrates - they have a complete internal skeleton including skull, spine and ribs. Invertebrates lack any internal skeleton.
Vertebrates have spinal cords. Invertebrates have no spinal cord.
well vertebrates are animals that have a backbone and invertebrates are animals that don't have a backbone
They both have a spinal cord protected by vertebrae. That is the key trait of all vertebrates. So whales and sharks are both vertebrates.
No, they have a backbone just like you do.
Blue whales are vertebrate. They are also, just like us, mammals.
Animals that have backbones are considered vertebrates, while animals without are invertebrates. So sharks, having backbones, are vertebrates.
Yes, they both have back bones and are considered to be vertebrates.
Look for the traits of chordates. It is said that both sharks and humans are vertebrates or closely related invertebrates.
invertebrates
vertebrates and invertebrates different?
Yes, the Great White Sharks are vertebrates. In fact, all fishes and sharks are vertebrates.
Caterpillars don't have spines, they are invertebrates. Dogs, birds, whales have spines because they are vertebrates. Spiders, butterflies, moths don't have spines they are called invertebrates.
Vertebrates have spinal chord and invertebrates don't.
Vertebrates have spines & invertebrates do not have spines.