1. which of the following molecules is an inorganic molecule?
a, sucrose
c. collagen
b. cholesterol
d. sodium chloride

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above