Biology-related:

* Biochemistry: The study of chemical processes within living organisms.

* Bioethics: The ethical implications of biological research and technology.

* Biodiversity: The variety of life on Earth.

* Biofuel: Fuel derived from organic matter.

* Bioinformatics: The use of computers to analyze biological data.

* Biomechanics: The study of the mechanical principles of living organisms.

* Biophysics: The study of the physical principles of living organisms.

* Biopsy: The removal of a sample of tissue for examination.

* Biotechnology: The use of living organisms or their products for commercial or industrial purposes.

* Bioremediation: The use of living organisms to clean up environmental pollution.

Other:

* Biography: A written account of a person's life.

* Bionic: Relating to the combination of biological and artificial systems.

* Biosphere: The part of Earth where life exists.

* Biomass: The total mass of living organisms in a given area.

* Biometric: Relating to the measurement of biological characteristics.

* Biodegradable: Capable of being broken down by living organisms.

This is not an exhaustive list, as there are many other words that start with "bio."