Biology: The study of life.
Biochemistry: The study of chemical processes within and relating to living organisms.
Biophysics: The study of physical principles that govern the structure and function of living systems.
Biotechnology: The use of living organisms or their products to create or modify products or processes.
Biodegradable: Capable of being broken down by living organisms.
Biodiversity: The variety of life on Earth.
Biome: A large, naturally occurring community of flora and fauna occupying a major habitat.
Biomechanics: The study of the mechanics of living organisms.
Biometrics: The use of biological characteristics to identify individuals.
Biopsy: The removal of a small sample of tissue for examination.
Biofuel: Fuel derived from organic matter.
Biohazard: A biological substance that poses a threat to human health.
Bioinformatics: The use of computer science to analyze biological data.
Bioreactor: A vessel in which a biological process is carried out.
Biosphere: The part of Earth where life exists.
Biostratigraphy: The study of the distribution of fossils in rock strata.
Biotechnology: The use of living organisms or their products to create or modify products or processes.
Other words with "bio" in them:
* Bionics: The application of biological principles to engineering.
* Bioethics: The study of ethical issues in biology and medicine.
* Biosphere: The part of Earth where life exists.
* Biogeography: The study of the geographical distribution of living organisms.
* Biogeochemistry: The study of the chemical interactions between living organisms and their environment.
* Bioaccumulation: The increasing concentration of a substance in organisms as it moves up the food chain.
This is not an exhaustive list, but it gives you a good starting point.