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.
How the test works. Recall the Central Limit Theorem: Using this, we determine if our assumption for the null hypothesis (H. 0. ) is reasonable or not. If it is unlikely, by the Rare Event rule, our hypothesis is probably incorrect (i.e. reject H. 0. ).