Question

which is a tough and rigid layer that surrounds plant cells, as well as some algal and bacterial cells?
cell wall
centriole
nucleus
cell membrane

Explanation:

The cell wall is a tough and rigid layer that surrounds plant cells, as well as some algal and bacterial cells. It provides structural support and protection. The cell membrane is flexible. The nucleus contains genetic material. Centrioles are involved in cell division in animal cells (not relevant here as we are looking for the tough/rigid layer).

Answer:

cell wall