Which came first: land plants or dinosaurs?

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.

What is used to keep track of the gamates and possible offsprings combination

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks