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.
The point of conducting an experiment is to find a significant effect between the stimuli being tested. To do this various statistical tests are used, the 2 being discussed in this blog will be the ANOVA and the t-test. In a psychology experiment an independent variable and dependant variable are the stimuli being manipulated and the behaviour being measured.