The independent variable is the type of food available.<span>The dependent variable is the frequency of each type of beak (or number of birds with each beak type)</span>
Barometer because a barometer is used to measure air pressure which is used especially in forecasting weather hope that helps :)
Yes because a homogeneous mixture is a mixture that has the same uniform appearance and composition throughout while with heterogeneous you can see the different parts of the mixture and pick them out
