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?
structure x is not living, and structure y is living.
structure x can be found in some human cells, and structure y can be found in some plant cells.
structure x is only found in plant cells, and structure y is found in plant and animal cells.
structure x is semipermeable, and structure y is selectively permeable.

Explanation:

Assuming structure X is the cell wall (only in plant cells) and structure Y is the cell membrane (in both plant and animal cells).

• Cell walls (structure X) are non - living and cell membranes (structure Y) are living.
• Cell walls are fully permeable and cell membranes are semi - permeable/selectively permeable.
• Cell walls are only found in plant cells and some prokaryotes, while cell membranes are found in all living cells (plant and animal).

Answer:

Structure X is not living, and structure Y is living.