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.
Experiment Introduction. Purpose of Experiment. The purpose of this experiment is to test a software system; we aren't testing you. Don't worry if you have trouble with some of the tasks, it's the system's fault, not yours. Don't feel bad or become frustrated; it's these problems that we are looking to identify.