<span>There are three major groups of mammals, categorized on the basis of their method of reproduction. Monotremes lay eggs to have children instead of having the mother bear them. The second type of mammal is the marsupial, which are non-placental animals who carry their young in their pouches. Eutherians are the third group who are placental mammals.</span>
The correct answer is Nucleic Acids. I hope this helps. :)
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:
Molecules that are readily soluble in water are considered polar molecules.
Explanation:
Molecules that are readily soluble in water (or other polar solvents) are considered polar molecules. This is because they can form dipole-dipole bonds or hydrogen bonds, which allows them to form joints with water molecules and thus dissolve in it.
Atoms are not composed of <u>xenons.</u>
