QUESTION 18
A theory
a. is a problem to be solved.
Ob. is the opening statement of an experiment.
Oc. is always true.
d. may be revised or replaced.

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d

2. which is the last step in the scientific method?

Question 17 (1 point) where does penicillin come from? a. it is a chemical that man invented b. it is a fungus c. it is a toxin made by other bacteria d. it was discovered in archaebacteria