The stimulus response of a sea urchin involves a range of behaviors triggered by environmental stimuli. For instance, when exposed to light, sea urchins may exhibit negative phototaxis, moving away from bright light sources. They also respond to chemical stimuli in the water, such as food or toxins, by adjusting their movement or retracting their spines. Additionally, sea urchins can display defensive behaviors in response to predators, including curling up and using their spines for protection.
The classification of a Sea Urchin is Echinoidea
sea urchin
A sea urchin does move, but not very frequently.
because the crab needs the sea urchin for protection and the sea urchin needs the crab for food
Ummm...it's the thing from which a sea urchin hatches?
I think a sea anenome and a sea urchin can live together because i have a little aquarium and there is a sea urchin and and a sea anenome (if that's how you spell it) living in there and they were perfectly fine. BUT if you have a sea urchin do not have any crabs in there, because my sea urchin killed one, and almost killed another one by taking its claw off. :(
A stimulus is an external event that triggers a response in an organism. A response is the reaction or behavior that an organism exhibits as a result of a stimulus. In short, a stimulus is the input, while a response is the output.
Spines of the sea urchin can cause injuries of the skin.
It urges the sea to adapt to IT! The litle urchin urger.
a blue tuxedo sea urchin
A response caused by a neutral stimulus is known as a conditioned response. This occurs when the neutral stimulus becomes associated with a unconditioned stimulus through conditioning, leading to a learned response.
A (street) urchin is a child who lives on the street, surviving by engaging in petty crimes. A (sea) urchin is a spiny creature (exoskeleton), with a soft interior. I welcome improvements to this answer.