Smooth muscle lines the walls of many of the
organs that make up the digestive system. The
smooth muscle contracts in ways to move the
food through the digestive system in a
process called peristalsis. The smooth muscle
found in the walls of the stomach and
intestines is considered which of the
following?
A. cell
B. organ
C. organism
D. tissue

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

The reaction below shows a system in equilibrium. how would a decrease in temperature affect this reaction? a. the rate of formation of the gases would increase. b. the equilibrium of the reaction would shift to the left. c. the equilibrium would shift to cause the gases to sublime into solids. d. the chemicals on the left would quickly form the chemical on the right.