Answer:
The procedure shows two different food situations. However, the initial populations of birds are the same. Therefore, at the end, you can compare the next generation for each food situation and measure the effect of the food change. If the food type changes in a given environment, then the amount of each type of bird beak will changes as birds with beaks more suited to the available food will consume more successfully over time. The independent variable of the lab is the type of food that is available to the birds. The dependent variable of the lab is the frequency of each type-size and shape-of beaks
Explanation:
