Volatile substances used by “huffers” travel rapidly to the brain, causing dizziness, giddiness, and euphoria. although these substances are not habit forming, studies show that long-term used can yield brain, kidney, and liver damage. what is this the study of? drug chemistry drug pharmacokinetics drug pharmacology toxicology

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs