My answer may not be precise, but I believe if you changed your question to "The presence of these structures indicates that the student is looking at a cell of what organism", then I would safely say a plant, because plants, unlike animals, have cell walls in addition to cell membranes. :) Hope this helps!
Answer:
A. Salt
Explanation:
-A compound is when two or more atoms are chemically combined
Answer:
D. do cows milk and goats milk contain different nutrients
