Ten different types of culture media were inoculated with the same strain of bacteria and incubated at the same temperature. nine of the cultures grew. which of these conclusions can be drawn from this information?
a. one of the media lacked the nutrients needed for the bacteria to grow.
b. the temperature varied greatly during the experiment.
c. only the culture that failed to grow bacteria was inoculated properly.
d. the media used in the experiment are all capable of sustaining bacterial growth.

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?