Use the following information to answer the questions below.
You have collected samples from mud at the bottom of a nearby pond and have isolated different bacteria and protists from that community.You put the cultures in appropriate media in test tubes with loose-fitting lids and leave for the night,confident that your cultures will be growing well when you return.
-When you come back the next morning,you notice that the culture in test tube A hasn't grown at all,while all the other ones have.You conclude that the culture must be composed of