no they are not poisonous but they are dangerous
no. they just hurt A LOT.
A porcupine has spines as its defences.
No, unlike porcupines, they have hollow tubes on their back.Hedgehogs are easily recognized by their spines, which are hollow hairs made stiff with keratin. Their spines are NOT poisonous or barbed and, unlike the quills of a porcupine, cannot easily be removed from the hedgehog. However, spines normally come out when a hedgehog sheds baby spines and replaces them with adult spines. This is called "guiling" When under extreme stress or during sickness, a hedgehog can also lose spines.
Their spines
If you mean spinal columns, yes pandas have them. If you mean prickly spines, such as the porcupine or hedgehogs have, the answer is no.
Quills
The spines on blow fish are poisonous.
Sea urchins do NOT shoot there spines. They can simply let them pop out (sort of like a porcupine). Most people make this mistake... neither a porcupine or sea urchin SHOOT there spines. They do harden and stick out farther but they DO NOT SHOOT THEM!
Porcupine fish or better known as blow fish have very few predators do to their poisonous spines and ability to expand. Sometimes they are preyed upon by sharks and killer whales and the baboes by tuna and dolphins
Porcupines have quills.
That depends on which kind of spines you mean. Giraffes are vertebrates. That means that they have spines, as in a backbone. They do not have spines as in sharp pointed protrusions like a porcupine has.
cells are an organism's basic units of structure and function
The spines help a porcupine to survive as it makes it difficult for another animal to eat it or attack it