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Its hair.
Its spikes, called quills ; this defensive adaptation protects the docile porcupine from predators.
spinny skinned animal
their quills so they can defend themselves from predators.
Physical and behavioral adaptations
True of false adaptations can be physical characteristics but not more complex features such as behavior?
Yes, these are called "Structural Adaptations". How an animal acts is part of its "Behavioral Adaptations".
coco
The porcupine uses its sharp quills for body armor. If a predator gets too close, the quills will stick to anything that brushes against them. The barbs get imbedded into the skin of the attacker, causing pain.
both
No animal can survive without both. Even having legs is a physical adaptation. If an animal had no behavioral adaptations, it would just sit in one place and die of starvation. So jackrabbits have both physical and behavioral adaptations.
Some of their adaptions are the thorns on their body and their small body.