A researcher uses a new growth (chemically-defined) medium but that no bacteria grows regardless of which organisms are inoculated in it. What is not in the medium? Sucrose, Amino acids, carbon source or lipids (choose one only)

Often, caries will develop in an area of the tooth that's not readily accessible. which cavity preparation form defines this? a. retention b. resistance c. outline d. convenience

What advantages does a pedigree have over a written passage?

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?