1. Suppose you design an experiment to study the amount of growth shown by plants exposed to different types of fertilizer. You use 3 different fertilizer brands on tomato plants that you keep in individually enclosed chambers
to collect the oxygen they each produce.
a. State the null hypothesis of this experiment.
b. Identify the following variables:
independent variable
dependent variable
c. Describe an appropriate control treatment for this experiment.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

answer: "circumcision is a common procedure in which the skin covering the tip of the penis is surgically removed."

answer; hypnagogic sensations)

i'll try what topic lol