Enzymes act as catalyst
they raise the activation energy
they lower the activation energy
they use activation energy
they maintain activation energy

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

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.