Observations, tested hypotheses, and the laws of other scientific disciplines are incorporated into that explain broad biological principles and allow predictions to be made about the properties of living organisms.

Theories

Explanation:

Theories in the world of science is an unproved conclusions and ideas based on the observations based on hypothesis rather than proved scientific theory.

Theories are a group of statements or explanations which have been established over time from many different individual experiments.

Thus observations and tested and proved hypothesis and also various laws which is derived from other scientific disciplines are incorporated into theories which is used to explain broad biological principles and laws.

Thus the answer is theories.

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