What is the term for different “jobs” that different cells perform in a multicellular organism?
a.
functions
b.
systems
c.
levels
d.
contractions

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

How does a large body of water, such as the ocean, influence climate?

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.