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.
It is an attempt to answer your question with an explanation that can be tested. A good hypothesis allows you to then make a prediction. If _____[I do this] _____, then _____[this]_____ will happen.. State both your hypothesis and the resulting prediction you will be testing.