All living things are composed of one or more .
A. organs
B. cells

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of