Genetics, botany, and zoology are all branches of what subject?

A. Chemistry

B. biology

C. physics

D. astronomy

Biology deals with living organisms (such as bacteria and animals). Physics deals with forces (such as gravity). Chemistry deals with elements and chemicals (such as water and helium). Astronomy deals with space (such as the planets and stars). Genetics are our genes. Botany is flora (flowers). Zoology is the study of animals. What do all of those have in common?

B. Biology, Biology is the study of life. All of these branches lead to Biology since they deal with living organisms.