Producers because they make their own food such as plants..
Answer:
There are four major classes of biological macromolecules.1.)carbohydrates 2.)lipids 3.)proteins 4.)nuclic acids .each is an important cell component a performs a wide array of functions.
Answer:
Open circulatory system:
Relies on the heart to keep blood flowing
Used in all vertebrates
Sorry thats all i know :)
The Bear population would increase due the the raise in the salmon population.
