When charged particles from the sun strike atoms in earth's atmosphere, it causes electrons to move to a higher energy state. When the electrons drop back to a low energy state they release light photons. This is what causes the Aurora lights
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.
D. two atp are invested in the process of glycolysis
The endoplasmic reticulum is the answer
The answer to this question is <span>C) Storage of materials
The vacuole structure is usually membrane-bound and consists of compartments that is used to filled in with water, organic, materials and non-organic materials that will later be used by the organism. So i believe the most appropriate word for its function would be a storage.</span>
