Bacteria cells, I believe so.
Paramecium have cilia, volvox have flagella
paramecium are individual single-celled organisms, volvox live in spherical colonies with many other cells forming a sphere
paramecium feed off smaller protoctists and bacteria, volvox produce their own food because they have chlorophyll
Carcinogens are substances that cause cancer
Answer:
Any sort of sexural reproduction.
Explanation:
Unlike asexual reproduction, sexual reproduction allows the species being produced to adapt the the changing environment around it to increase the chances of survival. For asexual reproduction, clones are made of the parent and, therefore, cannot withstand any extreme conditions that the parent species couldn't. For a changing environment, sexual is the best to allow the specimen and its offspring to change positively along with the environment.