Biology

Biology is the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.

• term

  organs

  definition

  an organ is a self-contained group of tissues that performs a specific function in the body

• term

  ketone bodies

  definition

  ketone bodies, or simply ketones are substances produced by the liver during gluconeogenesis, a process that creates glucose in times of fasting and starvation.

• term

  natural selection

  definition

  natural selection is a pressure that causes groups of organisms to change over time.