The same basic ____________ _________ apply to all creatures great and small.Biological rulesNitrogenous BasesPhosphate Groups

The correct phrase to fill in the blanks is "Biological rules."

Explanation:

Biological rules encompass the fundamental principles that govern all living organisms, irrespective of their size or complexity. These rules can include the laws of genetics, cellular function, evolution, and homeostasis, among others. They outline how organisms grow, reproduce, and interact with their environments. The term "Biological rules" suggests an overarching set of guidelines that apply universally to life forms, indicating that, regardless of being a single-celled organism or a complex mammal, all creatures follow certain biological principles. In contrast, the terms "Nitrogenous Bases" and "Phosphate Groups" refer to specific components of nucleic acids like DNA and RNA, not general rules applicable to all life forms.