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 other variables are called controlled variables because the experiment is designed to keep them at an unchanging value, known as controlling a variable. A valid experiment should have only one independent variable. Purpose of an Independent Variable An experiment attempts to trace the causal relationship between two factors in a natural process, such as the effect temperature has on the rate of a certain chemical reaction.