19) Which answer choice CORRECTLY describes each picture of the levels of organization of this green plant? A) P: tissue, Q: organ, R: organ system, S. cell
B) Porgan system. O cell, R:organS tissue
P: organ. Q: tissue, R: organ system, S: cell
D) P. cell. Q: organ, R: organ system, S:tissue

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

The slope of a velocity time graph over any interval of time gives the during that interval

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1