Answer:
either bacterial cells or plant cells but I think bacterial
Explanation:
from google: Bacteria are single celled microbes. Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). ... They can exist as single cells, in pairs, chains or clusters.
- cannot be human or mouse cells as both are animals and animal cells do not have cell walls