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.
During a hypothesis testing, both groups start off the same. The control group is left unchanged, while some kind of change is added to the experimental group. The results of the change are measured by comparing the experimental group to the control group. This is why it is important that each group stay independent, or it influences the outcome of the experiment, according to SimplyPsychology.org.