Cells use different processes at different times to provide an organism with the energy that it needs. spirulina is an autotrophic bacteria that can be found that can be found in freshwater and marine environments which process takes place in the cells of spirulina that does not occur in the cells of a human?
a. photosynthesis.
b. aerobic respiration.
c. anaerobic respiration.
d. cellular respiration.

The correct answer is (a) Photosynthesis.

Spirulina is autotrophic bacteria found in freshwater. It has the ability to perform all the different types of respiration such as photosynthesis, cellular respiration, anaerobic, aerobic respiration. Photosynthesis is the process by which green plants and blue-green algae make their own food by the help of carbon dioxide and sunlight and release oxygen and glucose. The special feature present in spirulina is photosynthesis which cannot occur in the human beings.