First one should be true because neutrons don't carry a charge therefore they won't affect the overall charge of the atom.
Second one should be positively charged, dense, and contains most of the mass of the atom
I could be wrong but I believe the answer is True.
Biologists used the world's largest single-celled organism, an aquatic alga called Caulerpa taxifolia, to study the nature of structure and form in plants. It is a single cell that can grow to a length of six to twelve inches.
I believe the polysaccharide that provides rigidity and strength in plants would be cellulose. As this is one of the essential components found in the cell wall of plant cells.