What is one biotic factor that can change the size of a population in an ecosystem?

a) the type of soil present

b) the number of predators present

c) the average yearly temperature

d) the amount of available groundwater

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.