Ascientist 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.

The correct answer is option It contains cellulose.

The cellulose is the component, which make up the cell wall of the plant cells. The cell wall made up of cellulose is an unique feature of the plant cells. It helps the plant to stand up straight against gravity by providing structural support. The cell wall is absent in the animal or the human cell, so, cellulose would not be find in human cell but it would be present in human cell.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.