Question

A scientist is comparing the outer structure of an onion cell, structure X, to the outer structure of a human skin cell, structure Y. Which generalization is true about the types of structures being examined?
A) Structure X is not living, and structure Y is living.
B) Structure X can be found in some human cells, and structure Y can be found in some plant cells.
C) Structure X is only found in plant cells, and structure Y is found in plant and animal cells.
D) Structure X is semipermeable, and structure Y is selectively permeable.

Answer 1

Out of the choices given here, the generalization that is true about the types of structures being examined is that structure X is only found in plant cells, and structure Y is found in plant and animal cells. The correct answer will be C. 

Answer 2

The correct option is C.

The outer structure of an onion is made up of cellulose cell wall. Cellulose is a material that is found only in plant cells, it is not present in the animal cells. The plant cell wall is made up of cellulose; cellulose is a polysaccharide, which gives the cell wall its form and rigidity. Structure Y on the other hand, which is cell membrane is found in both plants and animals cells.