As a biologist studying dinoflagellates (a type of protist) from local oceans, you notice that the chloroplast is surrounded by four membranes. You also notice that the chloroplast shares many characteristics with red algae, and you find circular DNA closely related to cyanobacteria DNA. From this, you hypothesize that this lineage of dinoflagellates was the result of

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.