Select the most appropriate 'one word' for the expression given below.

Study of human being & their ancestors through time.

Anthropology

The most appropriate one-word substitute for the expression "study of human being & their ancestors through time" is anthropology.

• Physiology is the study of the functions of living organisms.
• Biology is the study of life and living organisms.
• Ethnology is the study of human cultures.

Anthropology is the study of human beings, including their physical and cultural development, their societies and cultures, and their relationship to the rest of the natural world. It is the most appropriate word for the given expression because it specifically refers to the study of human beings and their ancestors through time.