7. evolution is which of the following?
a. a set of assumptions about the earths atmosphere
b. a scientific theory that has been largely disproven
c. a way of explaining of how organisms develop
d. an explanation of how organisms develop and diversify

8.why do marine scientists often take more than one representative sample?
a. populations can vary even within the same region.
b. there are often mistakes in representative samples
c. there is a long tradition of taking several samples when documenting population
d. marine scientists lack the technology to determine the population at the oceans depth.