Which statement best describes the amount of catalyst that remains at the end of a reaction?

Where do homologous chromosomes exchange genetic material through crossing over?               a.  chlorophyll    b.  centrosomes    c.  centromeres    d.  chiasma

Mr. olajuwan was in a horrific snowmobile accident. afterwards he had trouble walking and he had a loss of balance. which of the 4 major brain region was probably demaged

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil