CHECK Leave a Comment / MDCAT / By medixprep Biology Quiz Biology Quiz Time Left: 05:00 Jump to Question: At which times there is no net gaseous exchange between leaves and the atmosphere? Day Night Dawn and dusk Midnight Competitive inhibition can be overcome by using Low concentration of substrate Moderate concentration of inhibitors High concentration of inhibitor High concentration of substrate These animals show radial symmetry. Chordates Annelids Cnidarian Round worms Submit Quiz