Identify a negative control for the effects of hormone addition.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

find out why you don't need to aim at such a syllable pattern in english. you may have thought that haiku was supposed to be 5-7-5, so what's up with the logo by the gravitational pull of celestial objects, can touch us in unexpected ways.

answer; cnidarians;