What always forms when a chemical reaction occurs?

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

Name the types of burns one can get and which structures of the integument are damaged

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.