In meiosis ii during anaphase ii which structures separated homologous chromosomes or sister chromatids

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"