Answer:
A case study of the effects of mutation: Sickle cell anemia. Sickle cell anemia is a genetic disease with severe symptoms, including pain and anemia. The disease is caused by a mutated version of the gene that helps make hemoglobin — a protein that carries oxygen in red blood cells.
Explanation:
Octopus and squid have chemoreceptors on their tentacles. The correct option is the third option.
