I believe the answer is c. because of Darwin's theory of evolution..
Answer:
it would be 6
Explanation:
6 types of joints in the human body
Gene therapy affects a cell by A) Cells with functioning genes are replaced with mutated genes.
Answer:
Ecological and ethological approaches to the study of behaviour. The natural history approach of Darwin and his predecessors gradually evolved into the twin sciences of animal ecology, the study of the interactions between an animal and its environment, and ethology, the biological study of animal behaviour.