Question

a______ is a rigid layer that surrounds a plant cell, providing structural support.
a. cell membrane
b. chloroplast
c. nucleus
d. cell wall

Explanation:

To solve this, we analyze each option:

• Option A: The cell membrane is semi - permeable and controls the movement of substances in and out of the cell. It is not a rigid layer for structural support of the plant cell.
• Option B: Chloroplasts are organelles in plant cells that are responsible for photosynthesis. They have nothing to do with the structural support of the cell.
• Option C: The nucleus is the control center of the cell, containing genetic material. It does not provide structural support.
• Option D: The cell wall is a rigid layer that surrounds plant cells (and some prokaryotes and fungi). It provides structural support, protection, and helps maintain the shape of the plant cell.

Answer:

D. cell wall