Question

a scientist is comparing the outer layer of an onion cell to the outer layer of a human skin cell. what is unique about the outer layer of the onion cell compared to the skin cell? it contains proteins. it contains cellulose. it contains carbohydrates. it is selectively permeable.

Explanation:

Onion cells are plant cells which have a cell - wall made of cellulose. Human skin cells are animal cells and do not have a cell - wall made of cellulose. Both types of cells have proteins, carbohydrates in their cell membranes, and both cell membranes are selectively permeable.

Answer:

It contains cellulose.