Sort the variables of these three studies based on whether they are independent or dependent variables. Study 1: the effect of light on flowering patterns of plants Study 2: the effect of penicillin on the growth of E. coli Study 3: the effect of progesterone on the ovulation of rats light flowering patterns progesterone penicillin growth of E. coli ovulation

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

the answer is d p: cell, q: organ, r: organ system, s: tissue

if someone had the list of traits you provided