Answer:
Understanding physics impacts biology in many ways because physics have huge role in the research part of biology like if we need to obtain a pure culture of bacteria we need to understand the physics of temperature on which bacteria optimally grow.
We have to understand some of the laws like beer-lambert law which determines the relation between absorbance of light and concentration of substance which is used in spectroscopy technique.
Physics is very important in understanding the molecular interaction and forces between molecules found in living organisms. Medical industry is dependent on discoveries and invention occurred in the field of physics for treatment of humans. Therefore understanding of physics has positively impacted biology.