is bladderwort a producer of a consumer. An animal that can't produce its own food and it eats plants and other animals. That is what a consumer is.
If it is; What is the purpose of a control in verifying a hypothesis or conducting an experiment, it is: Controls are needed to eliminate alternate explanations of experimental results. That is in order to test a particular variable you need a control. For e.g.
Additionally, the research design must make clear the procedures used to ensure the protection of research subjects, whether human or animal, and to maintain the integrity of the information collected in the study. There are many ways to design a study to test a hypothesis. The research design that is chosen depends on the type of hypothesis (e.g. Does X cause Y? or How can I describe X and Y? or What is the relationship between X and Y?), how much time and money the study will cost, and whether or not it is possible to find participants.