The crayfish have its nerve cord on the ventral side rather than on the dorsal side. The ventral side is under the Crayfishes' exoskeleton, as opposed to the dorsal side where the exoskeleton is . If it is attacked it will be from the dorsal side and the nerve cord would be snapped easier. The function of the nerve cord is that if it gets attacked by a predator they will go for the top and it will still be able to move.
<span>They capture energy from sunlight and manufacture their own food</span>
Carbon Monoxide. Carbon Monoxide is polluting the air not water, everything else on the list is something that can pollute the water.
The answer is C) System. Systems can be found all over the animal kingdom. Most of the time, the organisms that belong to a particular system cooperate and collaborate with each other in order to remain healthy and safe.
